636: Which of the following statements best describes "carbon fertilization"?
(a) Increased plant growth due to increased concentration of carbon dioxide in the atmosphere
(b) Increased temperature of Earth due to increased concentration of carbon dioxide in the atmosphere
(c) Increased acidity of oceans as a result of increased concentration of carbon dioxide in the atmosphere
(d) Adaptation of all living beings on Earth to the climate change brought about hr the increased concentration of carbon dioxide in the atmosphere
637: Which of the following, grants direct credit assistance to the households?
1. Regional Rural Banks
2. National Bank for Agriculture and Rural Development
3. Land Development Banks
Select the correct answer using codes given below.
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
638: Fuel used in a nuclear reactor is:
(a) Uranium
(b) Heavy water
(c) Barium
(d) Cadmium
639: Consider the following statements :
1. Sikkim has the minimum area among the 28 Indian States (Delhi and Pondicherry not included).
2. Chandigarh has the highest literacy rate among Pondicherry, NCT of Delhi and other Union Territories.
3. Maharashtra has the highest population after Uttar Pradesh among the 28 Indian States (Delhi and Pondicherry not included).
Which of the statements given above is/are correct ?
(a) 1 only
(b) 1 and 2
(c) 2 and 3
(d) 3 only
640: With which one of the following rivers is the Omkareshwar Project associated?
(a) Tapi
(b) Bhima
(c) Narmada
(d) Chambal