Who is the most friendly professor in IIT Madras? Why?

According to one of my friends, who is an alumnus of IIT Madras, it is Prof. C Balaji from Mechanical Engineering Department.

He is an amicable person and is very understanding towards students. In fact, he is the coolest professor that you will ever meet. You can give him thousands of reasons for being late to the class or feeling sleepy during the lectures and yet, he will listen calmly and try understanding your problem. He will rather crack a joke on it.

You can share anything with him without any second thought. He will attentively listen to it and give you some valuable feedback. It is pretty evident from this that he is more of a friend than a professor.