Explanations:The Ganga River Basin is a significant geographical region in India, encompassing a vast area that includes the drainage basin of the Ganga River and its numerous tributaries. The Ganga River, also known as the Ganges, is one of the most important rivers in India, both culturally and geographically. It originates from the Gangotri Glacier in the Himalayas and flows through several states before emptying into the Bay of Bengal.
The Ganga River Basin is home to many major cities and towns, including Lucknow and Patna. Lucknow is the capital city of Uttar Pradesh, a state that lies in the heart of the Ganga River Basin. Patna, the capital of Bihar, is also situated within this basin. Both cities are located along the banks of the Ganga River or its tributaries, making them integral parts of the Ganga River Basin.
On the other hand, Guwahati and Dispur, mentioned in Option B, are located in the state of Assam. Assam is part of the Brahmaputra River Basin, which is a separate geographical region from the Ganga River Basin. The Brahmaputra River, which flows through Assam, is a major river in northeastern India and is not part of the Ganga River system.
Understanding the geographical distribution of major rivers and their basins is crucial for various fields, including geography, urban planning, and environmental studies. The Ganga River Basin is particularly important due to its cultural significance and the large population it supports. Cities like Lucknow and Patna are not only significant urban centers but also play a vital role in the economic and cultural life of the region.
Therefore, the correct answer is Option A, which correctly identifies Lucknow and Patna as cities located in the Ganga River Basin.