The Green Revolution was an agricultural initiative that took place in India during the 1960s and 1970s. It aimed to increase agricultural productivity and reduce hunger by introducing new technologies and practices such as high-yielding varieties of crops, irrigation systems, and the use of fertilizers and pesticides.

However, the Green Revolution was not implemented uniformly across the country. It was primarily focused on certain crops and specific regions. In this case, the Green Revolution was mainly confined to wheat production in Punjab and Haryana.

Reasons for focusing on Wheat in Punjab and Haryana:

1. Crop suitability: Wheat was chosen as the primary crop for the Green Revolution in Punjab and Haryana because these regions had favorable agro-climatic conditions for its cultivation. The availability of fertile soil, adequate irrigation facilities, and the absence of major pests and diseases made wheat production highly feasible in these areas.

2. Demand and marketability: There was a high demand for wheat in India, as it is a staple food crop. By focusing on increasing wheat production, the government aimed to address the issue of food scarcity and ensure food security for the growing population. Additionally, wheat had good marketability, making it a financially viable choice for farmers.

3. Government support: The government played a crucial role in promoting the Green Revolution in Punjab and Haryana. It provided farmers with subsidies, advanced agricultural machinery, improved irrigation facilities, and access to high-yielding varieties of wheat seeds. These measures helped farmers adopt new agricultural practices and technologies more easily.

4. Success in pilot projects: Prior to the widespread implementation of the Green Revolution, pilot projects were conducted in Punjab and Haryana to test the effectiveness of the new agricultural practices. These projects yielded positive results, with significant increases in wheat production. The success of these pilot projects further reinforced the decision to focus on wheat in these regions.

5. Infrastructure and logistics: Punjab and Haryana had well-developed agricultural infrastructure and marketing networks, which facilitated the implementation and success of the Green Revolution. Adequate storage facilities, transportation networks, and market linkages ensured that the increased wheat production could be efficiently stored, transported, and sold.

Therefore, the Green Revolution was primarily confined to wheat production in Punjab and Haryana due to the suitability of the crop, high demand, government support, success in pilot projects, and the presence of infrastructure and logistics.

The correct answer is Wheat in Punjab and Haryana.