This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Motor System, Subject name: Physiology
The first reflex response to appear as spinal shock wears off in humans is: 
Select and explain. 
A. Tympanic reflex, B. Withdrawal reflex, C. Neck righting reflex, D. Labyrinthine reflex
B: Withdrawal reflex
Answer: B: Withdrawal reflex 
Explanation: As the stage of spinal shock passes off, functional activity returns first in smooth muscle. The reflex movement that appears first is the flexor (withdrawal) reflex. Tone in flexors begins to return; limbs tend to adapt a position of slight flexion "paraplegia in flexion". - The other signs/reflexes seen are: Babinski's sign, Mass reflex, profuse sweating. Overall first reflex to appear after spinal shock is bulbocavernous reflex