Science

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.

You can be a dietician or you can work in a school as a home science teacher.

You can give medical exams to get admission in government medical colleges.

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.