I wanted to ask that which book is most preferable DC Pandey or BM Sharma. Some say dc pandey is good while others say that BM SHARMA is good. So please help me.

According to me you should buy BM sharma . as it has explained all concepts clearly. you can also buy physics galaxy by ashish arora.

please approve my answee

@ vyom 
u should go with d c pandey . 
h c verma + d c pandey these two books can give you  a rank in jee advanced , even i can guarentee u that if u properly studied . 
in d c pandey u will get enough problem to practice and in h c verma u will get enough theory for practice , so, both will satisfy the syllabus and pattern of jee , 
HOPE IT CLEARS 
ALL THE BEST ..