This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
Fisch's physiological bottleneck (narrowest pa) is present in which pa of VII N NOT RELATED - ENT 
Select and explain. 
A. Labyrinthine segment, B. Geniculate ganglion, C. Horizontal segment, D. Mastoid segment
A: Labyrinthine segment
Answer: A: Labyrinthine segment 
Explanation: .