this question can be answered based on two things:
- you are seeking for knowledge and need to clear the subject properly.
- you just need to clear the subject and need your semester to be very chilled out.
if first is your case then go for velu.m he’s kind off strict and will give you miserable time during your semester ,but he knows the subject very well and it will help you for the better understanding of the subject.(make sure that you pass if you are choosing him)
if second is your case then you can blindly take krishna kishor k.v.s and thank me later.
p.s:there are other good faculties too..you may refer other people for their opinion too.