Q. Who among the following persons has won the prestigious World Badminton Championship 2015 in women’s single category?

Answer of this question "Who among the following persons has won the prestigious World Badminton Championship 2015 in women’s single category?", here are 4 choices for this question : Carolina Marin Martin, Saina Nehwal, P V Sindhu, Martina Hingis .
Answer Is "Carolina Marin Martin".