Indus Civilization existed in:

Explanation

The historical period is determined on the basis of the knowledge of a decipherable script. The period before the knowledge of writing is called the prehistoric period. In Indian history, the period from about 3000 BC to 600 BC is considered protohistoric. The Indus Civilization belongs to the protohistoric period because writing was known here, but it has not been deciphered so far.