Dear Aspirant, if you are interest in Biotechnology , Biomedical Imaging and related fields, then you should go for PCMB. Else Choosing PCMC for all other engineering fields is considered a better a option.

However, getting admission into any engineering course will only require you to have PCM, so you may choose any subject as your 4th subject. Since a good introduction will always be provided to you in college, in Biology or Computer, depending on your specialization.

hey,

I hope you are doing well , so you are interested in engineering then i would suggest you to take physics , chemistry , mathematics and computer science that is PCMC reason being , in future you would be able to take computer science engineering and you find it easy as you would be already studied that in your 10+2, and if you take PCMB then you will have to focus on both mathematics and biology and may you would loose the charm to become an engineer

hope this helps

good luck!