Secretions of all these are required for maturation and motility of sperms except.

Options

A. Vas deference
B. Seminal vesicle
C. Vas efference
D. Prostate gland

Answer

To solve the question regarding which secretion is not required for the maturation and motility of sperm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which of the given secretions is not necessary for the maturation and motility of sperm.

2. **Identify the Components of Male Reproductive System**:
- Sperm is produced in the seminiferous tubules.
- After production, sperm travels through various ducts and glands.

3. **List the Accessory Ducts**:
- The main accessory ducts involved in the transport of sperm include:
- Rete testis
- Vasa efferentia
- Epididymis
- Vas deferens

4. **List the Accessory Glands**:
- The accessory glands that contribute to the maturation and motility of sperm include:
- Seminal vesicles
- Prostate gland
- Bulbourethral gland

5. **Determine the Role of Each Component**:
- The epididymis is crucial for sperm maturation and motility.
- The vas deferens transports sperm but does not contribute secretions necessary for maturation.
- Seminal vesicles and prostate glands provide secretions that enhance sperm motility and viability.

6. **Identify the Odd One Out**:
- Among the listed components, the vas deferens is primarily a transport duct and does not provide secretions that aid in sperm maturation or motility. Therefore, it is the correct answer to the question.

7. **Conclusion**: The answer to the question is **vas deferens**, as it does not provide secretions necessary for the maturation and motility of sperm.

### Final Answer:
The correct answer is **C) Vas deferens**.