Hi sir. My name is Sindhu and I got 121 mark in NEET 2019.I belong to SC category. Will I get a seat in private colleges in Tamil nadu.

Hello,
As you mentioned with SC category and 121 marks, your chances of getting a decent government college anywhere are negligible.As your marks are too low you might not even get some private medical college.
I suggest you to go for some other course or prepare for nEET next year.
However you can go for management quota seats in private colleges but fees would be 40 lakhs+.
However cutoffs change every year depending upon level of toughness of exam. So hope for the best and follow the counselling process.

Follow this link to better predict your college-
https://medicine.careers360.com/neet-college-predictor
Good luck