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: Physiology
'Swinging flashlight' test can be helpful to elicit 
Select and explain. 
A. Argyll Robeson pupil, B. Adie's tonic pupil, C. Marcus Gunn pupil, D. Subtle inequality in pupil size
C: Marcus Gunn pupil
Answer: C: Marcus Gunn pupil 
Explanation: The relative afferent pupillary defect(RAPD) - Marcus Gunn pupil- can be elicited with the swinging flashlight test.