Home / Ancient History Batch / HIS_ANC_2018_151 The Decline of the Harappans UPSC Archival Analysis Exam Year 2018 Evidence Source Link ID: HIS_ANC_2018_151 Ref: Standard Educational Reference According to the report of IIT Kharagpur study group, continuous low rainfall for how many years was the cause of fall of the Indus valley civilization? A. 600 yearsB. 700 yearsC. 800 yearsD. 900 yearsE. None of the above/More than one of the above