Dear aspirant

Medical College have strict rules about leaving the course in between that's why they make you sign bond paper and undertaking at the time of admission only. As medical seats are very precious in India due to low number, if you leave in between that's mean that seat will go waste, that's why college have strict policy regarding leaving the college in between.

As you are in private medical, you might have to pay whole course tution fees for leaving.

As you asked what happens if you simply leave, nothing will happen but the thing is you will not get your original documents which you have submitted during admission time. So if you want to study further any other courses you can't study without those documents. Every college or university needs to see your original documents at the time of admission.

So that's the biggest demerits that if you leave in between and don't pay to them they will not return your original documents of your class 10th and 12th. That will leave you for nothing you will able to do any course further.

Hope this explanation was enough for you, for doubt you can revert back always in comments or can post new question.

Good luck