Which of the following set in man includes vestigial organs:

Options

A. Coccyx, vermiform appendix and ear muscles
B. Body hair, atlas vertebra and ear muscles
C. Coccyx, wisdom tooth and patella
D. Body hair, cochlea, vermiform appendix and tongue

Answer

To determine which set in humans includes vestigial organs, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Vestigial Organs**:
- Vestigial organs are body parts that have lost most or all of their original function through the course of evolution. In humans, examples include the coccyx (tailbone), vermiform appendix, and certain muscles in the ear.

2. **Analyzing Option 1**:
- **Coccyx**: This is the remnant of a tail and is considered a vestigial organ.
- **Vermiform Appendix**: This organ is thought to have had a digestive function in ancestral species but is largely redundant in humans today.
- **Ear Muscles**: These muscles allow some animals to move their ears, but in humans, they have little to no function.
- **Conclusion**: This option includes all vestigial organs.

3. **Analyzing Option 2**:
- **Body Hair**: This serves a purpose in temperature regulation and is not considered vestigial.
- **Atlas Vertebra**: This is a crucial vertebra that supports the skull; it is not vestigial.
- **Ear Muscles**: While these are vestigial, the presence of the other two organs makes this option incorrect.
- **Conclusion**: This option does not include a complete set of vestigial organs.

4. **Analyzing Option 3**:
- **Coccyx**: Vestigial organ.
- **Wisdom Tooth**: While often problematic, it still serves a function in chewing.
- **Patella**: This is the kneecap and is not vestigial.
- **Conclusion**: This option does not include a complete set of vestigial organs.

5. **Analyzing Option 4**:
- **Body Hair**: Not vestigial.
- **Cochlea**: This is part of the inner ear and is essential for hearing; not vestigial.
- **Vermiform Appendix**: Vestigial organ.
- **Tongue**: Essential for taste and speech; not vestigial.
- **Conclusion**: This option does not include a complete set of vestigial organs.

6. **Final Conclusion**:
- After analyzing all options, we find that **Option 1** (Coccyx, Vermiform Appendix, and Ear Muscles) is the only set that includes all vestigial organs.

### Answer:
The correct answer is **Option 1: Coccyx, Vermiform Appendix, and Ear Muscles**.

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