Assertion : Green revolution was comparatively less effective in developing world where farmers were dependent on conventional breeding
Reason : In developing world, inability to buy expensive agro-chemicals forced farmers to rely on conventional breeding.

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

Explanation

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that the Green Revolution was less effective in the developing world where farmers relied on conventional breeding methods.
- This means that the advancements in agricultural production seen in the Green Revolution did not have the same positive impact in developing countries compared to developed countries.

2. **Understanding the Reason**:
- The reason provided explains that the inability of farmers in the developing world to afford expensive agrochemicals forced them to depend on conventional breeding methods.
- This implies that the lack of financial resources limited the farmers' ability to adopt the new technologies and practices that were part of the Green Revolution.

3. **Analyzing the Relationship**:
- The assertion and reason are closely related. The effectiveness of the Green Revolution was contingent upon the adoption of high-yielding varieties and the use of agrochemicals and better farming practices.
- Since farmers in the developing world could not afford these inputs, they could not fully benefit from the advancements of the Green Revolution.

4. **Evaluating the Truth of the Statements**:
- Both the assertion and the reason are true. The assertion accurately describes the situation in the developing world, and the reason provides a valid explanation for why the assertion is true.

5. **Conclusion**:
- Since both the assertion and the reason are true, and the reason correctly explains the assertion, the answer is that both statements are true and the reason is the correct explanation for the assertion.

### Final Answer:
Both assertion and reason are true, and the reason is the correct explanation for the assertion.