Symbol 'X' denotes: (A) Air conduction threshold for right ear, (B) Bone conduction threshold for right ear, (C) Air conduction threshold for left ear, (D) Bone conduction threshold for left ear
Answer is C. .An "O" often is used to represent responses for the right ear and an "X" is used to represent responses for the left ear. A key on the audiogram, similar to one found on a map, identifies what the different symbols mean Hence, indicates air conduction test for left year Ref physiology textbook A. K Jain.. 3e