Who is the author of “Harry Potter” series?

(A) J.R.R. Tolkien
(B) J.K. Rowling
(C) Suzanne Collins
(D) Rick Riordan

The answer is: (B) J.K. Rowling
The globally acclaimed Harry Potter series was written by British author Joanne Rowling, who is widely known by her pen name, J.K. Rowling.