Hello Manupriya bharti, According to AICTE, to pursue an MCA course candidates must have pursuedBCA / BSc/ BCom/ BA degree with Mathematics as one of the subjects at 10+2 level or at graduation, it doesn't matter which subject you have taken as optional subjects or which subject as main subject.so you are eligible for MCA.
But some college might asks good CGPA as their eligibility criteria in admission in MCA courses.