India has two major drainage systems, one flowing eastward and the other westward. Can you name them both?

Drainage Divide: India has two major drainage systems:

Eastward Drainage System: This system comprises the Indus, Ganges, and Brahmaputra rivers, which flow eastward into the Bay of Bengal.
Westward Drainage System: The Narmada and Tapi rivers are the major rivers in this system, flowing westward into the Arabian Sea.