The statements are given below, labelled as Assertion (A) and Reason (R). In the context of these two statements, select the correct answer from the codes given below.
Assertion (A) : Punjab, Haryana, Uttar Pradesh are major wheat producing states of India.
Reason (R) : The well drained fertile soil, 10°-15°C temperature during winter and about 75 cm annual average rainfall are necessary for wheat production.
Codes:

The correct answer is (A) Both (A) and (R) are true and (R) is the correct explanation of (A).

• Punjab, Haryana, and Western Uttar Pradesh form the core of the Green Revolution in India, primarily because the agro-climatic conditions in these regions perfectly align with the specific requirements for wheat cultivation.
• Wheat is a rabi crop that requires a cool growing season with 10°-15°C temperature and ideally 50-75 cm of annual rainfall. The alluvial, well-drained fertile soils of the Indo-Gangetic plains are optimal for its development, explaining why these states are the top producers.
• Since the Assertion correctly identifies the leading states and the Reason accurately provides the scientific and climatic justification for why these specific regions are suitable for wheat production, (R) serves as the correct explanation for (A).