Cells producing testosterone under the influence of LH and present in interstitial spaces are:

Options

A. Spermatogonium
B. Leydig cells
C. Secondary spermatocytes
D. Sertoli cells

Explanation

To solve the question regarding the cells that produce testosterone under the influence of LH and are present in interstitial spaces, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Context**: The question asks about specific cells in the male reproductive system that produce testosterone. We need to focus on the cells that are influenced by LH (luteinizing hormone).

2. **Understand the Role of LH**: Luteinizing hormone (LH) is a hormone that plays a crucial role in regulating testosterone production in males. It stimulates certain cells in the testes.

3. **Identify the Cells in the Testes**: In the testes, there are different types of cells:
- Sertoli cells: Support and nourish developing sperm cells.
- Leydig cells (also known as interstitial cells): Responsible for the production of testosterone.
- Germ cells: Involved in the formation of sperm.
- Other supporting cells.

4. **Focus on Leydig Cells**: The cells that produce testosterone in response to LH are the Leydig cells. These cells are located in the interstitial spaces between the seminiferous tubules in the testes.

5. **Confirm the Function of Leydig Cells**: Leydig cells produce testosterone, which is essential for the development of male secondary sexual characteristics and the production of sperm.

6. **Select the Correct Answer**: Based on the information gathered, the correct answer to the question is **Leydig cells**.

### Final Answer:
The cells producing testosterone under the influence of LH and present in interstitial spaces are **Leydig cells**.