Hello SirI have got the following options:-IITJEE eml 5633Aieee8677(air)Bitsat 287Wbjee 383(possible to get jadavpur university)Please tell me the preference order NITs, RGIPT, BITS pilani or Jadavpur University(West Bengal) for ECE or ME.

Leave aside your JEE rank.. you have got much better options than that

well you got a very good rank in AIEEE Surely you must go there..

Bitsat is also a  very good option for you

Well, You really seem to be good scholar..

Well your order of prefference should be

1st. NITs

2 nd Bits Pilani

3rd . Jodavpur university(west Bengal)

best of luck