Explanation: The Ganga Plain, also known as the Gangetic Plain, is a vast alluvial plain in northern India that is formed by the Ganga River and its tributaries. This plain is one of the most fertile and densely populated regions in India, extending across several states, including Bihar, Delhi, and West Bengal.
The Ganga Plain is characterized by its flat terrain and rich alluvial soil, which is highly suitable for agriculture. The plain is formed by the deposition of silt and sediment carried by the Ganga and its tributaries, such as the Yamuna, Gomti, and Ghaghara. This process of sediment deposition has been ongoing for thousands of years, creating a vast expanse of fertile land.
Bihar, located in the eastern part of the Ganga Plain, is a significant agricultural state. The plain in Bihar is known for its rice cultivation and other crops like wheat, sugarcane, and pulses. The state's geography is heavily influenced by the Ganga and its tributaries, which provide water for irrigation and support the agricultural economy.
Delhi, the capital city of India, is also part of the Ganga Plain. Although it is primarily known as a metropolitan city, the northern part of Delhi lies within the Ganga Plain. The plain's influence can be seen in the city's soil composition and the presence of agricultural areas in the outskirts of the city.
West Bengal, particularly in its northern and eastern parts, is another state that is part of the Ganga Plain. The plain in West Bengal is known for its rice cultivation and other crops like jute, which is a significant cash crop in the region. The Hooghly River, a distributary of the Ganga, also flows through West Bengal, contributing to the region's agricultural productivity.
In summary, the Ganga Plain extends through multiple states, including Bihar, Delhi, and West Bengal, and is a crucial geographical feature that influences the agricultural and economic activities in these regions. The correct answer is (D) All of the above, as the Ganga Plain indeed covers all these states.