Presently Comp Sci is the most sought after topic since companies come in gr8 numbers and U will notice that in NITs or IITs or any private institute it is the 1st branch to be filled up followed by ECE.

At present IT is doing gr8 but for future I m not sure since the value of money against dollar is on the rise IT companies will go for other avenues. The sole reason IT was on a high was that at that time rupee was weak and IT companies from the west found it profitable but now i doubt it.

Math is COMPULSORY it u take up IT or Comp sci

By the which college are u joining, from ur question i can say that u r opting for some private institute so i will say go for Comp sci or IT as ur future will be secured since labs for Bio tech in private are not upto the mark

for any more help contact me…