Tanks form the main source of irrigation in …………… .

1. Punjab and Haryana
2. the Deccan Plateau
3. Madhya Pradesh and Gujarat
4. All of the above.

Assertion (A): Cherrapunji, which receives about 11,000 mm of rainfall annually, suffers from acute shortage of drinking water.

Reason (R): Most of the rain falling on the surface tends to flow away rapidly, leaving very little for the recharge of groundwater.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

Rahul is constructing a house in Mathura. Of the following methods select those that he can use to ensure rainwater harvesting.

(i) A garden
(ii) Porous tiles in his driveway
(iii) Rooftop rainwater harvesting
(iv) Borewell

1. (i), (ii), (iii), (iv)
2. (i), (ii), (iii)
3. (i), (ii), (iv)
4. None of them.

Assertion (A): Runoff from only paved surfaces is used for storing rainwater.

Reason (R): It is relatively free of bacteriological contamination.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.