Which of the following statements is true about the movement of the forearm? In

A. bending the arm, the biceps relax and the triceps contract
B. bending the arm, the biceps contract and the triceps relax
C. straightening the arm the biceps contract and the triceps relax
D. straightening the arm, both biceps and triceps contract

Correct Answer: Option B

B. bending the arm, the biceps contract and the triceps relax