Hello Saurabh

You have secured All India Rank 6423 in OBC category. Below I have mentioned the previous year closing cutoff of the medical colleges which you have mentioned for OBC category

LLRM MEERUT.      AIR 56758.    Mark 429

MLNMC.                  AIR 36561.    Mark 465

SNMCH                   AIR 8574.       Mark 545

You can expect a score near to this. However the cutoffs are subjected to change every year depending on Question level and no. of aspirants. However for more information kindly go through the link given below

https://medicine.careers360.com/articles/neet-cutoff-up