Hello
Tarun , On the basis of placement the best branch of NIT calicut was Computer Science and Engineering (CSE). Because there are the following recruiters of NIT Calicut are:

Amazon, Microsoft, DirectIT, Goldman Sachs, Morgan Stanley, J.P. Morgan, Oracle ST Tech, Bajaj, Larsen & Toubro, Tata Motors and Maruti.

hope it will be helpful for you :)