To take up computer science or IT courses, you should have passed 10+2 (Science stream) with Mathematics. So Physics and Maths are must for CS and IT(Engg).
An alternate is Diploma in Engineering from an institute approved by State Board of Technical Education of three years duration or more.
If you don't fulfill any of these conditions, better consider other areas for bachelor degree.
You can consider courses like Biotechnology, Bio-informatics, Biomedical, Bio Sciences or Life Sciences.
You can also go for Certifications in various IT fields such as hardware and networking, system administration, database administration, IT technologies, security, operating systems, quality, testing, etc. alongwith your regular studies.
There may be some colleges which offer BCA/MCA for non-maths students (specially for distance mode).
[Answered on July 26, 2014]