Assertion : Infertility is the inability to produce children inspite of unprotected sexual co-habitation
Reason : Infertile couples could have children using assisted reproductive technologies (ART)

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "infertility is the inability to produce children in spite of unprotected sexual cohabitation."
- This definition is accurate as infertility is typically defined as the failure to conceive after one year of regular, unprotected sexual intercourse.

2. **Understanding the Reason**:
- The reason provided is that "infertile couples could have children using assisted reproductive technologies (ART)."
- This statement is also true. ART encompasses various medical procedures that assist couples in conceiving when they face infertility issues.

3. **Evaluating the Truth of Both Statements**:
- Both the assertion and the reason are true statements.
- The assertion correctly describes infertility, and the reason accurately reflects the potential for infertile couples to conceive through ART.

4. **Assessing the Relationship Between Assertion and Reason**:
- The next step is to determine if the reason is a correct explanation of the assertion.
- While both statements are true, the reason does not explain the assertion. The assertion defines infertility, while the reason discusses a solution (ART) for those who are infertile.

5. **Conclusion**:
- Since both the assertion and the reason are true, but the reason does not serve as a correct explanation for the assertion, we can conclude that the correct answer is:
- **Option B**: Both assertion and reason are true, but reason is not the correct explanation of the assertion.