Hi Jaya,

Yes, it's completely your choice that you want to pursue Medical or Engineering. If you got an engineering college through KCET counselling, and then, you got a better college for medical through NEET and you are wishing to pursue Medical in that college, so, you can leave engineering easily. There is clearly no problem in that. Right to choose is in your hand.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!