Which branch should I choose, MNC in IIT BHU, IIT KGP, IIT Guwahati, or IIT Kanpur?

If you have an interest in Computer Science, then MNC in IIT BHU is an excellent choice as the program has more CS courses than Math. There are various other reasons that make this course an excellent choice

• IIT BHU has an environment conducive to coding and research.
• The curriculum is flexible with a wide variety of electives to choose from and explore all fields
• The programming clubs help hone your programming skills to the fullest
• The placement scenario is excellent and recently a student was offered a package of 1.29 crore by Microsoft with the average package being 30 lakhs.
• The usual average package is always above 20 LPA 
• Most CS companies offer similar job profiles to MNC students as well. Some of these are Microsoft, Oracle, Samsung, Uber, Intel, Flipkart, Goldman Sachs, etc.
• Being an old IIT, it has an extensive alumni network 
• There are great clubs and committees to promote extracurricular activities.
• TECHNEX, one of the oldest techno-management fest of India is organized by IIT BHU and its sports fest Spardha is the largest sports fest of India.

Basically, if you are inclined towards CS, then MNC at IIT BHU is better than both MNC at IIT Kanpur and CSE at newer IITs. MNC at IIT Kanpur is more inclined towards Math whereas the newer IITs lack the necessary infrastructure and opportunities.