It varies from college to college. The bond is of two types : bond against Seat and Service bond. Once you are admitted to a medical college, you need to pay an amount of money to leave it. Some bonds require you to serve the institution for a certain time or pay a fine AFMC has army service bond for 7 years while ESI has it 3 years. One needs to pay a certain amount if he/she doesn't want to work.
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