B.Sc

Hi Uddappa,
Any graduate can pursue MBA course. You need to get a decent score in CAT or MAT as it will help you to get a good business school.
All the best.

Yes, you can pursue MCA, graduate with 50% and mathematics as one of the subject in 12th are eligible for MCA.

Hi,
The field of chemistry is of great importance in our day to day life. It is commonly referred to as The Science of Matter. You can go for the following career options after B.Sc. in chemistry:
http://entrance-exam.net/career-after-bsc-chemistry/

The courses other than nursing, MBBS and B.Pharma are paramedical. It is a branch of medical, which helps above three to perform their duties to fullest. B.Sc nursing is a better choice because there is large need for this field in medical as compared with para medical courses. Nursing means helping doctors and keep a keen eye on treatment of the patient.
All the best.

Yes, you can as you have chemistry and zoology subject, which is useful for M.Sc in medicine. If you attempt for any entrance exam, they will ask you for these subjects, then you will have more chances to qualify it. I will suggest you to look some colleges, which allow you to choose M.Sc in medicine.
All the best.

1. Dayanand Sagar University – Bangalore.
2. Jai Hind College – Mumbai.

You can prepare for state level civil services exams, bank exams and railway exam. There are many opportunities for you.