एक नदी और उसकी सहायक नदियों द्वारा अपवाहित क्षेत्र को कहा जाता है , An area drained by a river and its tributaries is called a

Solution

A. basin

Explanation

The area drained by a river is called the river basin or drainage basin. This is the region where the waters of the river and its tributaries collect before draining into the sea or a large lake at its mouth.