What is the answer of question C

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asked Dec 2, 2020 122k views

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DrBwts · Answer 1 · 2020-12-06T14:16:14+0000

The answer is A.

Straightening of the arm is extension. The triceps (marked D) are responsible for this action. For this to occur the antagonistic muscle, the biceps (marked A) must relax.

What is the answer of question C

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