Correct Answer: Both assertion and reason are correct, and the reason is the correct explanation of the assertion.

Solution : The correct answer is (a) Both assertion and reason are correct, and the reason is the correct explanation of the assertion.

The assertion states that infrastructure development in India promotes regional connectivity and economic integration, which is correct. Infrastructure plays a crucial role in facilitating regional connectivity by providing the necessary physical networks for transportation, communication, and trade. Well-developed infrastructure, such as roads, railways, ports, and airports, enables the smooth movement of goods, services, and people across different regions within the country. This connectivity fosters economic integration by promoting trade, investment, and collaboration between different regions, leading to overall economic growth and development.

The reason provided states that well-connected infrastructure facilitates trade and the movement of goods and services, and this is the correct explanation of the assertion. Infrastructure, including transportation networks and logistics systems, is essential for facilitating trade activities. Efficient transportation systems enable the movement of goods from production centers to markets, reducing transaction costs and enhancing market accessibility. Additionally, well-connected infrastructure enables the smooth movement of services, such as banking, telecommunications, and tourism, which further promotes economic activities and integration between regions.

Therefore, both the assertion and reason are correct, and the reason serves as the correct explanation for why infrastructure development in India promotes regional connectivity and economic integration.