I am from Jammu and kashmir state .sir is there any chance of an MBBS seat.marks 460.category RBA

Dear Aubaid, RBA comes under General Category. During Counselling, you should inform your Category as RBA. Under Srare Quota in 2018, 440 marks secured a seat in Sher-e-Kashmir Institute of Medical Sciences. That was the cut off. Going by previous cut offs and your expectant score, you also have a fair chance at:
GMC, Jammu
GMC, Srinagar
Having said that, cut offs change every year and are dependant on various factors like no.of seats available, no.of candidates appearing for the exam, top NEET score and difficulty of the exam. You can also check the cut offs of various different colleges under your Category at:
https://medicine.careers360.com/articles/neet-cutoff-j-k