The distance between tympanic membrane and medial wall of middle ear at the level of centre is:: (A) 3 mm, (B) 4 mm, (C) 6 mm, (D) 2 mm
Answer is D. (d) 2mm(Ref. BD Chaurasia, Human Anatomy 6th ed., Vol 3, page 277)Part of the middle ear cavityDistance from lateral to medial wallEpitympanum6mm (widest)Mesotympanum (centre)2mm (narrowest)Hypotympanum4mm