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.

Which of the following least irrigated state of India is solely dependent on canals?

1. Assam
2. Mizoram
3. Tripura
4. Arunachal Pradesh

Assertion (A): For farmers rainfall is still the most important source of water.

Reason (R): Irrigation canals and tanks have been constructed by rulers since ancient times.

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.