Assertion (A): Many states have recorded a sharp fall in the groundwater levels, ranging from 70 to 80 per cent.

Reason (R): With the increase in population the demand for water has risen.

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.

Which of the following is a cause for the decline in groundwater levels?

1. Irregular and erratic rainfall
2. Urbanisation
3. Loss of vegetative cover
4. All of the above.

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.