Correct Answer: (a) Malwa
Note: Malwa plateau has a drainage system flowing both the westward and castward. Its western part is irrigated by the Mahi river, the central region by the Chambal river and the eastern part by the Betwa river. Apart from this, other rivers like Dhasan, Ken, Parvati, Kshipra, Gambhir, Chhoti Kali Sindh etc.. originate in the plateau of Malwa.