The correct answer is: D. Indo Gangetic Plain
The Indo-Gangetic Plain is a vast alluvial plain in the northern part of the Indian subcontinent. It is formed by the confluence of the Indus and Ganges rivers, and is one of the most fertile regions in the world. The Indo-Gangetic Plain is home to over half of India’s population, and is the country’s most important agricultural region.
The Western Plateau is a plateau region in the western part of India. It is a dry and arid region, and is not well-suited for agriculture.
The Central-North-Eastern Plateau is a plateau region in the central and northeastern part of India. It is a hilly region, and is not well-suited for agriculture.
The South-Eastern Plateau is a plateau region in the southeastern part of India. It is a hilly region, and is not well-suited for agriculture.
The Indo-Gangetic Plain is the only sub-zone of Jharkhand that has a large area under net cultivation.