Which of the following is a male hormone ?

Options

A. Testosterone
B. Estrogen
C. Both of these
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks for a male hormone among the given options.

2. **Examine the Options:**
- The first option is **testosterone**.
- The second option is a female hormone (not specified in the transcript).
- The third option states that both of the previous options are wrong.
- The fourth option states that none of the options are correct.

3. **Analyze the First Option (Testosterone):**
- Testosterone is known as the primary male sex hormone.
- It plays a crucial role in male sexual development, muscle mass regulation, and the production of sperm and red blood cells.

4. **Analyze the Second Option:**
- The second option refers to a female hormone, which is not testosterone. This indicates that this option is incorrect.

5. **Evaluate the Third and Fourth Options:**
- The third option claims both previous options are wrong, which is incorrect since testosterone is indeed a male hormone.
- The fourth option states that none of the options are correct, which is also incorrect because testosterone is a valid answer.

6. **Conclusion:**
- The correct answer is the first option: **testosterone**.