Anatomy Nerves of Upper Extremity 48092e2c Root value of supinator jerk- A C3 C4 B C4 C5 C C5 C6 D C8 T1 High-Yield Explanation Ans. is 'c' i.e., C5 C6 ReflexRoot valueBiceps reflex (biceps jerk)C5 C6Supinator reflex (Supinator jerk)C5 C6Triceps reflex (Triceps jerk)C7 C8Knee jerkL3 L4Ankle jerkS1 s2