Consider the following statements :
1. The Harappan economy was based on agriculture, cattle rearing and crafts.
2. The Indus valley people had an elaborate drainage system.
3. In kot Diji pre-Harappan settlement has not been found.
4. Sugarcane was not grown in Indus civilization.
Which of the above is/are correct ?
(a) 1, 3 and 4 (b) 2 only (c) 3, and 4 (d) 1 only