Washington D.C., the capital of United States of America, is located on the banks of which river ?

Answer 1

Potomac River

Answer 2

Protomac river

Answer 3

Potomac River
Washington, D.C., formally the District of Columbia and commonly referred to as "Washington", "the District", or simply "D.C.", is the capital of the United States. The signing of the Residence Act on July 16, 1790, approved the creation of a capital district located along the Potomac River on the country's East Coast.