Dear Aspirant,

You have scored a very decent rank to get most the branches of B.tech at Chennai campus. For the rank of 20846 you can definitely get the biotechnology  branch and even if you try more the you can also get some upper branches like IT, ECE still if you want only biotechnology then there is 100% chance that you will get that, for more queries please drop your message at reply section.

Best Of Luck!!!