This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerves of Upper Extremity, Subject name: Anatomy
C5C6 nerve roots reflex is of which muscle - 
Select and explain. 
A. Triceps, B. Biceps, C. Deltoid, D. None
B: Biceps
Answer: B: Biceps 
Explanation: Ans. is 'b' i.e., Biceps ReflexRoot valueBiceps reflex (biceps jerk)C5 C6Supinator reflex (Supinator jerk)C5 C6Triceps reflex (Triceps jerk)C7 C8Knee jerkL3 L4Ankle jerkS1 s2