The modern man differs from the apes in:

Options

A. Protruding eyes
B. Sparse body hair
C. Arms shorter than legs
D. Wearing of clothes

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks how modern humans differ from apes. This requires a comparison of anatomical and physiological traits between the two.

2. **Identifying Common Traits**: Both modern humans and apes share several traits due to their common ancestry. For example, both have similar eye structures and body hair distribution.

3. **Evaluating the Options**:
- **Protruding Eyes**: This option is incorrect because both modern humans and apes have similar eye structures, and neither has significantly protruding eyes.
- **Sparse Body Hair**: This option is also incorrect as both modern humans and some apes have varying degrees of body hair, and this trait is not a definitive difference.
- **Arm Length in Relation to Legs**: This option is correct. Modern humans have arms that are shorter than their legs, which is an adaptation for bipedal locomotion. In contrast, many apes have longer arms, which are suited for climbing and brachiation (swinging from branch to branch).

4. **Conclusion**: The significant difference between modern humans and apes is that modern humans have arms that are shorter than their legs, while apes have longer arms relative to their legs.

**Final Answer**: The modern man differs from the apes in that their arms are shorter than their legs.

---