Which book will be better for iit jee mains and advanced in mathematics? A das gupta or Ml khanna ?

Should I start from Rd sharma?

@ prtyay 
if u are targeting both jee mains as well as advanced then go with iit mathematics by m l khanna , this is the complete book for jee and covvers shortcut trick as well , 
and if u will able to manage that iit maths by m l khanna book , then no need of a das gupta or r d sharma . 
and alongwith that make sure to practice last year jee main and advanced paper . 
ALL THE BEST ..