Question - In India Karst landforms are formed in

In India Karst landforms are formed in 

(a) Jalpaiguri district, hills of Buxar and Jainti 

(b) Purnea district of Bihar 

(c) Jaisalmer region of Rajasthan 

(d) Mysore hills in Karnataka

Answer: 

(a) Jalpaiguri district, hills of Buxar and Jainti