This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Cone of light focuses on which quadrant of tympanic membrane 
Select and explain. 
A. Anteroinferior, B. Posteroinferior, C. Anterosuperior, D. Posterosuperior
A: Anteroinferior
Answer: A: Anteroinferior 
Explanation: A bright cone of light radiating from tip of malleus to the periphery in the anteroinferior quadrant of the tympanic membrane Ref: Dhingra 6th edition