The correct options are
A Hindukush mountains in the North-West to the Great Indian desert, Gujarat, the Indus.
B The Ganges valley, the plateau of Malwa.
C Central Indian forests, the Krishna Tunabadra valley and Godavari valley.
The borders of the Mauryan empire extended from the Hindukush mountains in the North West, to the Great Indian Desert, Gujarat, the Indus and the Ganges valley, the plateau of Malwa, the vast central Indian forests, The Krishna-Tungabhadra valley and the Godavari valley.