Hello AV, category rank of 48 in NIFTMFM is an excellent result. On the basis of last year cutoff for NIFTs, you'll get any course in any college of your choice. If not in the 1st round, you can easily get it in the 2nd round. I suggest you go for FD in NIFT delhi(2018 OBC Closing rank 343). I suggest you don't get nervous if you don't get the seat in the 1st round and wait for the next round.