1. With reference to the agricultural knowledge of the Harappans, consider the following statements :
- There is evidence of ploughed fields at Kalibangan and at Shortughai and also of terracotta models of plough at Banawali and Jawaiwala.
- There is ample evidence of advanced harvesting tools.
- Wheat was not known to Harappans.
How many of the statements given above is/are correct ?
