The contraction of one of the muscle rotates the forearm to turn the palm downward or backward. Identify the muscle from the following.

Abductor

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Extensor

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Flexor and adductor

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Pronator

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Solution

The correct option is D Pronator
The pronators are muscle of the human body (located in the forearm), that pronates the forearm (turning it so that the palm faces posteriorly from the anatomical position). Flexor is a muscle, which causes bending of the forearm towards upper arm by biceps. Extensor is the muscle which causes straightening of bend forearm.

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The muscle which on contraction rotates the forearm to make the palm face upward and forward is

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