Which of the following secondary sexual characteristics is not observed in boys?

Options

A. Growth of facial hair
B. Enlargement of larynx
C. Enlargement of ovaries
D. Growth of hairs on chest

Answer

To determine which secondary sexual characteristic is not observed in boys, we will analyze the given options step by step.

### Step 1: Understand Secondary Sexual Characteristics
Secondary sexual characteristics are features that develop during puberty and distinguish the sexes but are not directly involved in reproduction. In boys, these characteristics typically include changes such as facial hair, a deeper voice, and increased muscle mass.

### Step 2: Analyze Each Option
1. **Growth of Facial Hair**:
- This characteristic is observed in boys during puberty. Boys typically develop facial hair as they grow older, so this option is not the correct answer.

2. **Enlargement of the Larynx**:
- During puberty, boys experience an enlargement of the larynx, which leads to a deeper voice. This characteristic is also observed in boys, so this option is not the correct answer.

3. **Enlargement of Ovaries**:
- Ovaries are female reproductive organs, and their enlargement is a characteristic that occurs in females during puberty. Boys do not have ovaries, so this option is the correct answer.

4. **Growth of Hair on Chest**:
- Boys also develop chest hair during puberty, making this characteristic present in boys. Therefore, this option is not the correct answer.

### Conclusion
The secondary sexual characteristic that is not observed in boys is the **enlargement of ovaries**.

### Final Answer
**Enlargement of ovaries**

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