Hello Seshavalli G 

Among all three, there are quite less chance that you will get better facility that a iotech student should get. Its always the most undervalued branch in every college even in IITs.

So, if we comapre between these three then i would suggest you to go for biotech in RVCE for sure.

because that is the top college in bangalore abd above all many companies visit the campus so getting a job wont be a problem there.

Hope that helps!