Option b is the correct answer Proto history period was between prehistory and history period. This period witnessed the developments of writing. In India Proto-History spans the period around from 3000 B.C. to 600 B.C. covering the Bronze Age and Chalcolithic culture from the beginning of Harappan civilization up to the beginning of the historical period in 6th century B.C. which is the period of Buddha and Mahavira. Important Tips Prehistory, also called pre-literary history, is the period of human history between the first known use of stone tools 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The main difference between protohistory and prehistory is that protohistory is the period of time when a culture or civilization has developed writing but the written records that exist are not sufficient to provide a complete understanding of that culture or civilization. Prehistory, on the other hand, is the period of time before writing was invented.