Rigveda

Consider the following statements about the Rigvedic period

1. Irrigation from wells allowed agriculture to expand away from flood plains and strips on river margins into the present Punjab and Haryana plains having underground water levels reasonably close to the surface
2. Draught-animal power was employed to draw up water out of the wells

Which of the following information support/supports the above statements?

1. There is evidence in the Rigveda of the use of ashma chakra (stone pulley wheel) and ahava (strapped wooden pails) to draw up water
2. Mention has been made in the Rigveda of the use of implements like parashu/kulisha (axe) and datra/sreni (sickle)
3. There is a history of the use of ox, even before the Rigveda, for ploughing the land and pulling the carts

Consider the following assertion: In the Pleistocene period either the Yamuna once flowed into the Indus, or the Sutlej flowed into the Yamuna and one major tributary of either had shifted from the Ganga to the Indus or vice versa. Which of the following is/are the basis of the above assertion?

1. The Nadi-Sukta of the Rigveda
2. The explorations of the Sutlej and the Yamuna by Robert Bruce Foote
3. The presence of the same species of dolphins in both the Indus and the Ganga river systems