Which book is best for straight line and conic section for objectives?

@ KARAN
there is a book coming named as OBJECTIVE IIT MATHEMATICS by m l khanna , that is best for conic section as well as streight lines , these two are the most weightage chapter of jee , so, do it by concept , and also , u can take out the self study package from askiitians also oif that two chapters , they are awesome at the explanation . 
HOPE IT CLEARS YOUR DOUBT 
ALL THE BEST ..

The best books for above topics are ML Khanna and A Das Gupta.

You can refer any one of them.

Hope it helps.

Thank You.