Length of external auditory canal is?: (A) 12 mm, (B) 24 mm, (C) 36 mm, (D) 48 mm
Answer is B. ANSWER: (B) 24 mmREF: Dhingra 4th edition page 400'External auditory canal of an adult is 24 mm in length. Outer one-third (8 mm) is cartilaginous and inner two thirds (16 mm) are bony'1