Hello,MMC is the top ranked institution in state of Tamilnadu.Since it is a governent institution it is mandatory that the admission happens only through neet exam. The previous year cut off rank  is as follows

general -1611 ; OBC- 1611;SC -28603;ST-39785;EWS-1611;PWD-934

To know more about the institution kindly check this link https://www.careers360.com/colleges/madras-medical-college-chennai

Best of luck.