hii Sweety ,

As you not mentioned your category here . we can not say that admission will happen or not . You can check  last year cut off of BHU PET.  from link given below . After checking cut off you can predict your admission according to cut off . But according to your marks and  rank there is the Chance of admission is very few. You can wait for 2nd or 3rd round counciling . But my suggestion apply some other college like DU and state university for M.sc. Zoology . 

for cut off visit - https://www.google.com/url?sa=t&source=web&rct=j&url=https://university.careers360.com/articles/bhu-pet-cut-off/amp&ved=2ahUKEwi0o4nx2PTiAhWJaCsKHb81BkkQFjAFegQIChAB&usg=AOvVaw3Fws9cf1mNJwzCL5XX4XwZ&ampcf=1

Hope it helps!!!!

Sir I belong to obc caste.then you say me is it possible to admission on msc  zoology.last cutoff I see ,60 should be shown.but I not confirm clearly.my rank is 396 and got 60 mark in msc zoology.