Hello aspirate 

As you haven't mentioned the rank you got for bcom hons in bhu it's difficult to predict. But I would tell you that closing rank for general candidate is 1037 and for main campus your rank should be under 500 for safer side. 

Use the link below for more details on bcom cutoff of bhu uet 2019

https://www.google.com/amp/s/university.careers360.com/articles/bhu-uet-cut-off/amp

Good luck