MCA

No, they don't look over your marks of any individual subject. They may check out your aggregate marks in 12th class. If you are having above 60% aggregate, then there is no reason to be worried.
Hope this helps.
Thanks.

Dear Pooja!
In this case, you have possibly 2 options, #1) If you have missed the entrance of MCA. You can drop 1 (or 2 year) and utilise that effectively by gaining work experience in related field. This increase the Probability of MCA selection and gives you sufficient time for entrance preparation. #2) or you can do M.Sc. [IT/Statistics] or Data Science (preferred) else you can take tell chance for MBA. Pooja, whichever options you find suitable for you, go with it. Hope this helps. Upvote the answer if you feel satisfied.
Good Luck.

https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-india/96-2-0-0-0
https://www.shiksha.com/it-software/colleges/mca-colleges-india
Hope the link helps.

MCA is a Master's degree in computer Application course (2 year duration) for those having B.Sc. Non M.Ed or BCA or B.Sc. IT or B.Sc. Computer Science qualification.

Dear Gagandeep,
It is not the same. For regular MCA their is Mid Term Exam and End Term Exam, but for distance MCA there is only End Term Exam. Also, the pattern for the exams is different. For more information, visit LPU camp office in your town.
http://www.lpu.in/admission/lpu-in-your-town.php#lpu-town

Distance MCA (Lateral entry) is offered by International Institute of Management and Technology, Vadodara. There are over 17 Distance/Correspondence MCA colleges in Delhi Offering 20 Courses. Refer to the link provided below for a detailed list of these colleges. You should be able to navigate to a course of your choice using the filters on the web page. https://www.shiksha.com/it-software/colleges/distance-correspondence-mca-colleges-delhi.