Prostate glands are located below

Options

A. gubernaculum
B. seminal vesicles
C. epididymis
D. bulbourethral glands

Explanation

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about the location of the prostate glands in relation to other structures in the male reproductive system.

2. **Understand the Prostate Gland**: The prostate gland is a part of the male reproductive system. It plays a crucial role in producing seminal fluid.

3. **Locate the Prostate Gland**: The prostate gland is situated just below the urinary bladder. It surrounds the beginning of the urethra.

4. **Analyze the Options**:
- **Guberniculum**: This is not directly related to the prostate gland's location.
- **Seminal Vesicle**: The prostate gland is located below the seminal vesicle.
- **Epididymis**: This structure is located above the testis and is not in direct relation to the prostate gland's position.
- **Bulbourethral Glands**: These glands are located near the base of the penis and are not directly below the prostate.

5. **Determine the Correct Answer**: Based on the anatomical position, the prostate gland is located below the seminal vesicle. Therefore, the correct answer is **B. Seminal Vesicle**.