Which of the following is a secondary sexual characteristic in males?

Options

A. Reduction in the size of voice box
B. Development of mammary glands
C. Release of gamete every month
D. Development of pubic hair

Answer

To determine which of the following is a secondary sexual characteristic in males, we need to first understand the difference between primary and secondary sexual characteristics.

### Step-by-Step Solution:

1. **Understand Sexual Characteristics**:
- Sexual characteristics are traits that differentiate males from females. They can be categorized into two types: primary and secondary sexual characteristics.

2. **Identify Primary Sexual Characteristics**:
- Primary sexual characteristics are those that are present at birth and are directly related to the reproductive organs. For example, the presence of testes in males and ovaries in females.

3. **Identify Secondary Sexual Characteristics**:
- Secondary sexual characteristics develop during puberty and are influenced by hormones. They are not directly related to the reproductive organs but are associated with physical changes that occur during adolescence.

4. **Evaluate the Options**:
- We need to evaluate the given options to find out which one is a secondary sexual characteristic in males:
- **Reduction in the size of the voice box**: This is incorrect because the size of the voice box actually increases in males, leading to a deeper voice.
- **Development of mammary glands**: This is incorrect as mammary glands develop primarily in females.
- **Release of gamete every month**: This is incorrect because this refers to the female reproductive cycle involving the release of eggs from the ovaries.
- **Development of pubic hair**: This is correct as the development of pubic hair is a secondary sexual characteristic that occurs in males during puberty.

5. **Conclusion**:
- The correct answer is the **development of pubic hair**, which is a secondary sexual characteristic in males.