Actually from this year 12STD students have to compete with whole India I mean before the competitive exams were held in a quite different way.so opting only MPC or biPC which would allow us to focus only one goal where as pcmb is not so and adults say its not a good decision to opt pcmb.other poblem is I am confused what to do after pcmb. I am not that good in math so i feel engineering will be difficult and so im not clear of what to do after 12 std...i hope you understood my problem.... thanks