B.Sc

Yes, you can do MCA after BCA or Bsc computet science or B.Sc having one subject maths included . And you are doing bsc in pcm so you can do mca. MCA is a 3 year postgraduate degree and it will provide you exposure to many subjects of compuetr. Admission is on merit basis or on entrance exams like BIT MCA, VIT MEE, MAH MCA CET, UPSEE.

The total fee is about 25000 per year.

Yes there is a separate cut off for sports quota admission. Here is an article which will provide you detailed information along with documents required for admission
https://www.shiksha.com/articles/bhu-admission-2020-know-documents-required-for-sports-quota-admissions-blogId-48691

Admission to Cardiovascular Technology courses in Kerala is on the basis of marks obtained in Class 12th. Candidates can directly apply to these courses if the fulfil the following eligibility criteria: They must have attained the age of 17 years. They must have secure at least 50 per cent in Class 12.

The latest year cut offs are provided here:
https://www.shiksha.com/college/kristu-jayanti-college-kothanur-bangalore-30762/cutoff

Bachelor degree in Agriculture or related fields like Horticulture or Forestry from a recognised institution along with required entrance exam for India and Abroad. So I don't think you can do M.Sc. In agriculture from B.Sc. In geography.

St Francis College Hyderabad fee structure for B.Sc is INR 10,000 per year.

The total fee at Kongunadu College of Nursing for BSc Nursing is 1.2 lakhs i.e. 30,000 per year.