221: Hydroponics means:

(a) Cultivation of plants without the use of soil

(b) Detection of sound in water

(c) Animals living in water

(d) A Japanese way of flowering
222: The approximate age of the Aravallis range is

(a) 370 million years
(b) 470 million years
(c) 570 million years
(d) 670 million years
223: What is the average distance (approximate) between the Sun and the Earth?

(A) 150x10 6km
(B) 100x10 5km
(C) 110x10 6km
(D) 70x10 5km
224: With reference to the Cabinet Mission, which of the following statements is/are correct?

1. It recommended a federal government.
2. It enlarged the powers of the Indian Courts.
3. It provided for more Indians in the ICS.

Select the correct answer using the code given below.
(a) 1 only
(b) 2 and 3
(c) 1 and 3
(d) None
225: With reference to the Indian Renewable Energy Development Agency Limited (IREDA), which of the following statements is/are correct?

1. It is a Public Limited Government Company.
2. It is a Non - Banking Financial Company.

Select the correct answer using the code given below.
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 or 2