This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Marcus gunn jaw winking phenomenon due to relation between which cranial nerves 
Select and explain. 
A. VII + VIII, B. III + V, C. V + VII, D. III + VI
B: III + V
Answer: B: III + V 
Explanation: Ans. is 'b' i.e., III + V Marcus Gunn phenomenon (a.k.a. Marcus Gunn Jaw-Winkingor Trigemino-oculomotor Synkineses) IT is an autosomal-dominant condition with incomplete penetrance, in which nursing infants will have rhythmic upward jerking of their upper eyelid. This condition is characterized as a synkinesis: when two or more muscles that are independently innervated have either simultaneous or coordinated movements.