Go through the following matches
(i) Gluteus maximus - Chief extensor of knee
(ii) Hamstrings - Flexor of knee
(iii) Serratus anterior - Boxer's muscle
(iv) Deltoid - Flexor's shoulder joint
Which of these are correct?

Options

A. (i) and (iii)
B. (ii) and (iii)
C. (i),(iii) and (iv)
D. (ii),(iii) (iv)

Answer

To determine which of the matches regarding the muscles and their functions are correct, let's analyze each statement step by step:

1. **Gluteus maximus - Chief extensor of knee**
- The gluteus maximus is primarily known as the major extensor of the hip joint, not the knee. Therefore, this match is incorrect.

2. **Hamstrings - Flexor of knee**
- The hamstrings are a group of muscles located at the back of the thigh and are indeed responsible for flexing the knee joint. This match is correct.

3. **Serratus anterior - Boxer's muscle**
- The serratus anterior muscle is often referred to as the "boxer's muscle" because it is crucial for the movement of the scapula, especially during punching motions. This match is correct.

4. **Deltoid - Flexor of shoulder joint**
- The deltoid muscle is primarily responsible for the abduction of the shoulder joint, but it also assists in flexion. However, it is not solely a flexor of the shoulder joint. This match is somewhat misleading but can be considered correct in the context of its function.

Based on the analysis:
- The correct matches are:
- (ii) Hamstrings - Flexor of knee (Correct)
- (iii) Serratus anterior - Boxer's muscle (Correct)
- (iv) Deltoid - Flexor of shoulder joint (Correct, but not exclusively)
- The incorrect match is:
- (i) Gluteus maximus - Chief extensor of knee (Incorrect)

**Final Conclusion:**
The correct matches are (ii), (iii), and (iv). The incorrect match is (i).