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: Anatomy
Nuclear bag fibre detects 
Select and explain. 
A. Sense dynamic length of muscle, B. Involved in reciprocal innervations, C. Alpha motor neuron stimulation, D. Senses muscle tension
A: Sense dynamic length of muscle
Answer: A: Sense dynamic length of muscle 
Explanation: (Refer Q 5 AIIMS Nov'14)