C. The reason being is the Indus River Valley developed around the Ganges River and the Tigris river belongs to Mesopotamia which lies between both the Tigris and the Euphrates river
Indus - Tigris
Indus Valley is India/Pakistan border, Tigris is central Iraq
The false pairing is C. Indus Valley Civilization - Tigris River, as the Indus Valley Civilization developed around the Indus River, not the Tigris River. The other pairings listed (A, B, and D) are all accurate. The Tigris River is located in Mesopotamia, separate from the Indus Valley region.
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