“What did you see at the South Pole ?” Ashok asked Anil.

A. Ashok asked Anil if he saw anything at the South Pole.
B. Ashok asked Anil What he had seen at the South Pole.
C. Ashok asked Anil What did he see at the South Pole.
D. Ashok asked Anil that he saw anything at the South Pole.