The correct answer is option 2, Ganga basin.
To understand this, let`s first know what a basin is. A basin is a geographical area or region that drains into a particular river or body of water.
Chambal river is a major river in central India. It originates in the Vindhya Range in Madhya Pradesh and flows mainly through the states of Madhya Pradesh and Rajasthan before joining the Yamuna river in Uttar Pradesh.
The Ganga basin, also known as the Ganges basin, is one of the largest river basins in the world. It covers a vast area of northern India, including parts of Uttarakhand, Uttar Pradesh, Bihar, West Bengal, and Jharkhand. The Ganga river, which is considered sacred in Hinduism, is the main river of the basin.
Chambal river is one of the major tributaries of the Yamuna river, which in turn is a tributary of the Ganga river. Therefore, Chambal river is a part of the greater Ganga basin.
Hence, the correct answer is option 2, Ganga basin.