This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Muscle spindle 
Select and explain. 
A. Receptor for stretchreflex, B. Antigravity muscle, C. Multisynaptic reflex, D. Excited by strech and contraction of muscle
A: Receptor for stretchreflex
Answer: A: Receptor for stretchreflex 
Explanation: Muscle spindles are receptors of stretch reflex or monosynaptic reflex.(Ref. Textbook of physiology N Geetha 2nd edition page no.514)