[A]: Ear muscles of external ear in man are well developed.
[R]: These muscles do not move external ear freely to detect sound

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To analyze the statements provided in the question, we will evaluate both parts: [A] and [R].

**Step 1: Evaluate Statement [A]**
- Statement [A] claims that "Ear muscles of external ear in man are well developed."
- In humans, the ear muscles associated with the external ear (pinna) are not well developed. They are considered vestigial, meaning they have lost most of their original function through evolution. Therefore, this statement is **false**.

**Step 2: Evaluate Statement [R]**
- Statement [R] states that "These muscles do not move the external ear freely to detect sound."
- While it is true that the ear muscles in humans do not allow for significant movement of the external ear, the implication that this is a functional limitation is misleading. In many mammals, these muscles help in moving the pinna to better capture sound waves. In humans, the lack of movement does not hinder sound detection as our hearing relies more on other structures and mechanisms. Thus, this statement is also **false**.

**Step 3: Conclusion**
- Both statements [A] and [R] are false. The ear muscles in humans are not well developed, and while they do not move the external ear freely, this is not a significant limitation for sound detection in humans.