A : The secretions of male accessory glands constitute the seminal plasma which is rich in fructose calcium and certain enzymes.
R : Fructose serves as a source of energy for the sperms

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion then mark (1)
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion then mark (2)
C. If Assertion is true statement but Reason is false then mark (3)
D. If both Assertion and Reason are false statement then Mark (4)

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that the secretions from male accessory glands constitute seminal plasma, which is rich in fructose, calcium, and certain enzymes.
- Male accessory glands include the seminal vesicles, prostate gland, and bulbourethral glands.

2. **Analyzing the Components of Seminal Plasma**:
- Seminal plasma is indeed rich in fructose, which is a sugar that provides energy.
- It also contains calcium, which plays a role in sperm motility and function.
- Additionally, enzymes are present that help in various functions related to sperm viability and mobility.

3. **Understanding the Reason (R)**:
- The reason states that fructose serves as a source of energy for the sperm.
- This is true, as fructose is metabolized by sperm cells to produce ATP, which is essential for sperm motility.

4. **Evaluating the Relationship Between A and R**:
- Both the assertion and the reason are correct statements.
- However, the reason does not directly explain why the secretions of male accessory glands are rich in fructose, calcium, and enzymes. Instead, it explains the function of fructose in relation to sperm.

5. **Conclusion**:
- Since both statements are true but the reason does not correctly explain the assertion, the correct choice is that both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

### Final Answer:
- The correct option is: **Both assertion and reason are true, but the reason is not the correct explanation of the assertion.**

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