The muscles which on contraction rotates the foream the make palm face upward and forward is

Options

A. pronator
B. supinator
C. abductor
D. adductor

Answer

To solve the question: "The muscles which on contraction rotates the forearm to make the palm face upward and forward is," we will analyze the options provided and identify the correct muscle.

### Step-by-Step Solution:

1. **Understanding the Movement**: The question asks for a muscle that causes the forearm to rotate so that the palm faces upward and forward. This movement is known as supination.

2. **Identifying Muscle Types**: There are two main types of muscles involved in forearm rotation:
- **Supinator**: This muscle is responsible for supination, which turns the palm upward.
- **Pronator**: This muscle does the opposite; it turns the palm downward (pronation).

3. **Evaluating the Options**:
- **Option 1: Pronator** - This muscle causes the palm to face downward, so it is not the correct answer.
- **Option 2: Supinator** - This muscle causes the palm to face upward, making it the correct answer.
- **Option 3: Abductor** - This muscle pulls a limb away from the midline, which is unrelated to the movement described in the question.

4. **Conclusion**: The muscle that rotates the forearm to make the palm face upward and forward is the **Supinator**.

### Final Answer:
The correct answer is the **Supinator** muscle.

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