21: Kahuta is:
(a) A bird sanctuary in Tamil Nadu
(b) A tribe of Mizoram
(c) A place in Pakistan where nuclear research centre is located
(d) None of the above
22: Uplift of the backward classes was the main programme of the
(a) Prathana Samaj
(b) Satyashodhak Samaj
(c) Arya Samaj
(d) Ramakrishna Mission
23: Arrange the following three atmospheric layers starting from the surface of the earth
A. Stratosphere
B. Ionosphere
C. Troposphere
(a) A, B, C
(b) C, A, B
(c) A, C, B
(d) C, B, A
24: Proportional representation is NOT necessary in a country where
(a) there are no reserved constituencies
(b) a two-party system has developed
(c) the first-past-post system prevails
(d) there is a fusion of Presidential and Parliamentary forms of governments
25: Solve the given equations :
x2 + y2 = 34
x4 - y4 = 544
The values of x and y are
(a) ± 4, ± 3
(b) ± 5, ± 3
(c) ±3, ±5
(d) ±3, ±4