The angle that tympanic membrane makes with the floor of meatus is: (A) 15 o, (B) 25 o, (C) 45 o, (D) 55 o
Answer is D. Tympanic membrane is placed obliquely at an angle of 55 degrees with the floor of the meatus. Ref : B D Chaurasia's Human Anatomy , seventh edition , volume 3 , pg. no., 285.