21: Consider the following statements :
AIDS is transmitted
I. by sexual intercourse.
II. by blood transfusion.
III. by mosquitoes and other blood sucking insects.
IV. across the placenta.
Of these statements
(a) I, II and III are correct
(b) I, II and IV are correct
(c) I, II and IV are correct
(d) I and III are correct
22: The India-Pakistan boundary line has reference to:
(a) McMohan Line
(b) Radcliffe Line
(c) Durand Line
(d) Maginot Line
23: Consider the following statements regarding power sector in India :
I. The installed capacity of power generation is around 95000 MW.
II. Nuclear plants contribute nearly 15% of total power generation.
III. Hydroelectricity plants contribute nearly 40% of total power generation.
IV. Thermal plants at present account for nearly 80% of total power generation.
Which of these statements is/are correct ?
(a) I only
(b) II and III
(c) III and IV
(d) I and IV
24: The following table shows the percentage change in the consumption of electricity by five towns P, Q, R, S, T from 1986 to 1988 :
If town T consumed 500,000 units in 1986, how much did it consume in 1988 ?
(a) 371,000 units
(b) 531,100 units
(c) 551,100 units
(d) 571,100 units
25: The following persons came to India at one time or another :
I. Fa-Hien
II. I-Tsing
III. Megasthenese
IV. Hieun-Tsang
The correct chronological sequence of their visits is :
(a) III, I, II, IV
(b) III, I, IV, II
(c) I, III, II, IV
(d) I, III, IV, II