The secretions of the male sex accessory glands constitute the

Options

A. Seminal plasma
B. Serum
C. Semen
D. Urine

Answer

To solve the question regarding the secretions of the male sex accessory glands, we can break down the information step by step.

### Step-by-Step Solution

1. **Identify the Male Sex Accessory Glands**:
- The male sex accessory glands include the seminal vesicles, prostate gland, and bulbourethral (Cowper's) glands.

2. **Understand the Function of These Glands**:
- These glands secrete fluids that contribute to the composition of semen.

3. **Determine the Composition of Their Secretions**:
- The secretions from these glands primarily make up the seminal plasma, which is a component of semen.

4. **Analyze the Given Options**:
- **Option 1: Seminal Plasma** - This is the correct answer as it is the fluid produced by the male sex accessory glands.
- **Option 2: Serum** - This is incorrect; serum is a component of blood, not related to the male reproductive system.
- **Option 3: Semen** - While semen contains seminal plasma, it is not the direct secretion of the accessory glands but rather a mixture that includes sperm and seminal plasma.
- **Option 4: Urine** - This is also incorrect as urine is produced by the kidneys and not related to the secretions of the male sex accessory glands.

5. **Conclusion**:
- The correct answer to the question is **Option 1: Seminal Plasma**.