686: The meeting of Indian and British political leaders during 1930-32 in London has often been referred to as the First. Second and Third Round Table Conferences. It would be incorrect to refer to them as such because
(a) the Indian National Congress did not take part in two of them
(b) Indian parties other than the Indian National Congress participating in the Conference represented sectional interests and not the whole of India
(c) the British Labour Party had withdrawn from the Conference, thereby making the proceedings of the Conference partisan
(d) it was an instance of Conference held in three sessions and not that of three separate conferences
687: Which one of the following countries is not a member of ASEAN?
(A) Vietnam
(B) Brunei Darussalam
(C) Bangladeh
(D) Myanmar
688: With reference to agricultural soils, consider the following statements :
1. A high content of organic matter in soil drastically reduces its water holding capacity.
2. Soil does not play any role in the sulphur cycle.
3. Irrigation over a period of time can contribute to the salinization of some agricultural lands. Which of the statements given above is/are correct ?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3
689: There are mice in the field which act as prey to snakes. Hawks eat the snakes. Some dogs are brought into the field ? What will be its effect?
(a) Mice will decrease
(b) Hawks will decrease
(c) Snakes will increase
(d) Mice and snakes will decrease
690: How many times are an hour hand and a minute hand of a clock at right angles during their motion from 1.00 p.m. to 10.00 p.m.?
(A) 10
(B) 18
(C) 20
(D) 9