CBSE 12th

Hi
The eligibility for BCA in most of the good colleges is
1. Candidate must have completed Higher Secondary Examination or equivalent
2. The minimum marks secured in 12th standard should be at least 50%
3. The candidate should have pursued the science subjects. The science subjects should include Physics and Chemistry
4. Most institutes insist candidates should have pursued Mathematics during 12th standard
So go ahead and apply but do check any specific requirement.

Visit the following link:
http://www.gujarathelpline.com/education/colleges.php?category=B.V.Sc. (Bachelor of Veterinary Science)

The candidate should have obtained a minimum of aggregate 75% marks in Physics, Chemistry and Mathematics subjects (if he/she has taken Mathematics in BITSAT) or a minimum of aggregate 75% marks in Physics, Chemistry and Biology subjects (if he/she has taken Biology in BITSAT) subjects in 12th examination, with at least 60% marks in each of the Physics, Chemistry, and Mathematics / Biology subjects.
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Dont choose a subject depending on your marks. It is not like that one has got such and such marks so he should take xyz subject. Its totally your interest, passion. Dont take a subject which will create a burden on u. Enjoy the studies. Get a reputed college which is utmost important. Mechanical is a core engineering stream whereas cse is a softcore subject. Market are cse is decent nowadays. U may opt any of them but be careful of getting good grades thereafter. All the best. Thank you.