At IIST, most of the students are inclined towards ISRO. Even if you are interested in it, you might lose interest in the latter half of your bachelor's and then may regret your decision because IIST has very limited career options. That being said, look for an institute that caters to a variety of career prospects so that your options aren't limited. 

Considering the new IITs, both IIT Hyderabad and IIT Patna show promising results. I have a friend in IIT Patna and after a long conversation with him, I realized it has a plethora of opportunities both in terms of placements as well as higher education.

The placement scenario at IIT Patna is great and has been improving every year. 

•  IIT Patna has all big shot companies for placements like Microsoft, Amazon, Cisco, Samsung R&D, UHG, Practo, Yodlee, Flipkart, Arista Networks, Texas Instruments, Finisar, Tata Motors, L&T, Mahindra & Mahindra, Bank of America, etc.
• For those who prefer a stable job, many PSUs like Indian Oil, Bharat Petroleum, HPCL, DRDO, Coal India, etc come for recruitment here. 
• If you are among the top 1% of your batch you can get placed in companies like Google and Facebook, the pay scale of which is the highest you can get.
• The small batch size increases the probability of getting more placements in top companies than old IITs with huge batch sizes. 

Prospects for higher education:

Only after you become a part of the IIT family will you understand the true essence of the IIT tag that opens infinite doors of opportunities for you be it higher education or internships.

• My friend secured an internship in Germany only because he had ties with the IIT brand they said.
• Out of 37, 4 had the chance to do foreign internships which is a lot
• The students of his batch even went to top universities like Stanford, CalTech, etc. for their summer internships.
• Every year many students get qualified for the DAAD WISE scholarship in Germany, the Charpak scholarship for internships in France, and the MITACS in Canada, etc.
• As for MS and PhDs, around 18 out of 150 students pursued their higher education in US and Europe. Today they are placed in the top companies like Intel Corporation, Texas Instruments, Intersil Corporation, etc. in their respective countries. 

Having covered all career prospects, I will leave it to you to decide which institute to join. 

NIT Silchar is better for CSE than LNMIIT. The rich and active coding culture adds to the credibility of this institute. Many core companies visit the campus every year with a good salary package. The recent placement statistics at NIT Silchar are given below

So, you can go with the option of NIT Silchar for Computer Science and Engineering.

MNNIT Allahabad is better for Electrical Engineering. It offers better placement opportunities and exposure. The placement rate for the branch is around 97%. The average salary package offered for the branch stays in the range of INR 8 LPA - 9 LPA. The highest CTC goes up to INR 49 LPA. Microsoft, Adobe, Uber, Atlassian, etc. are among the major recruiters that take part in the placement drive.

Choose the course that interests you, college is a secondary thing. Here are some of the facts that may help you in choosing the right branch for you.

• If you want to work in PSUs or Govt. sectors, it’s better to not choose Production Engineering as there are fewer recruiters.
• Jadavpur is the best college you can get through WBJEE. If you choose Production or Power in JU, you will have good on-campus job opportunities.
• Production Engineering is a branch of Mechanical Engineering itself. The syllabus will be more or less the same. 
• Mechanical at Kalyani University will be slightly better than Jalpaiguri. You may not get lucrative job packages at on-campus placement from Kalyani University but in the long run, you will have a much better hold with your Mechanical degree. You can expect well-paid jobs in the future. 

Your future will depend on the branch you are choosing so choose according to your interest. All these Universities will offer you enough opportunities and resources to prosper. It’s up to you to use that well. 

I would never recommend you to go for any core branch at new IITs. With the new IIT tag, ISM Dhanbad is a far better option as it was established in 1926 and enjoys global recognition in contrast to IIT Hyderabad, which is still under development. Both the colleges are poles apart in terms of infrastructure, facilities, etc.

The table below shows a head-on comparison of the placement scenario at both the institutes:

There are many reasons for suggesting you go for MNNIT Allahabad CSE over NIT Rourkela CSE.

• MNNIT Allahabad has one of the oldest CSE branches so it boasts of a rich coding culture.
• The institute enjoys good connectivity via airways and railways, and thus the quality and number of recruiters are better than Rourkela which doesn’t-even have an airport. 
• MNNIT Allahabad is the best NIT in North India considering both home state and open state cutoffs.
• MNNIT Allahabad CSE placements are much better with the average standing at INR 27.57 LPA while NIT Rourkela CSE average package was recorded at INR 21.87 LPA. 
• MNNIT Allahabad is the 4th best NIT after Trichy, Warangal, and Surathkal.

These were some plausible reasons to choose MNNIT Allahabad over NIT Rourkela for CSE.