hii Banasmita, 

According to last year cut off of BHU PET programm , you have very less chance to get admission in main campus , but you must  be wait for 2nd or 3rd round counciling . But the chance of admission is very less .  You can apply for some other university like DU and state university for MA / M.Sc. geology . 

For last year cut off and more updates about admission visit - https://www.google.com/url?sa=t&source=web&rct=j&url=https://university.careers360.com/articles/bhu-uet-cut-off/amp&ved=2ahUKEwiF2vfErfLiAhVMuY8KHY6yCikQFjADegQIAhAB&usg=AOvVaw1RMUsy_2FX5LSZdBpbcioq&ampcf=1

Hope it help!!!