Which is best option, the executive program in sales and marketing at IIM Calcutta or the postgraduate certification in business management at XLRI, Jamshedpur?

Only the full-time PGP courses of IIM Calcutta or XLRI are valuable. All other degrees/certificates are the only means of earning money by the institutes. 

• They have no real value in real life or the corporate world. 

• They won’t be very useful if you want to learn.

• They add no value to your CV

• You will not be considered alumni of the institute

So these certificate courses/ part-time programs/ Executive programs carry no real value at all. Most people are misled to believe that they might add value to their CV.