Correct Answer: Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

Solution : The correct answer is (b) Both the assertion and reason are true, but the reason is not the correct explanation of the assertion.

The assertion is true. The Green Revolution in India did lead to a decrease in agricultural employment. The introduction of high-yielding varieties of crops and modern farming techniques resulted in increased productivity per unit of land, reducing the need for labor in agriculture.

The reason is also true. The adoption of modern farming techniques did reduce the labor requirement in agriculture. Mechanization, the use of machinery, and improved farming practices allowed farmers to achieve higher yields with fewer workers.

However, the reason provided is not the correct explanation for the assertion. While the adoption of modern farming techniques reduced the labor requirement in agriculture, it doesn't directly explain the decrease in agricultural employment.Therefore, the correct answer is both the assertion and reason are true, but the reason is not the correct explanation of the assertion.