Anterior wall of tympanic cavity contains:: (A) Promontry, (B) Bony pa of pharyngotympanic tube, (C) Processus cochleariformis, (D) Tensor tympani muscle
Answer is D. The anterior wall has a thin plate of bone which separates the cavity from internal carotid. It also has two openings - the lower one for Eustachian tube and the upper one for the canal of tensor tympani muscle.