Hello Namita

Admission to MBBS course in St.John's Medical College is done on the basis of scores in the NEET UG exam. See, the cutoff vary category wise.
According to the previous year cutoff of round 2, candidate with NEET score 416 was allotted a seat in St. John's Medical College under GMP category.

And, candidate with NEET score 543 was allotted a seat under Open category.

However, it should be noted that the cutoff vary every year depending on various factors such as the difficulty level of the exam, candidates appearing in the exam, etc.
So, you should alays aim to score more marks in the exam.

Do let us know if you have any other query or if you want to know about any other category.
Good Luck!