3551: Which one of the following statements is correct?

(a) Cirrus clouds are composed of ice crystals.
(b) Cirrus clouds exhibit a flat base and have the appearance of rising domes.
(c) Cumulus clouds are white and thin, and form delicate patches and give a fibrous and feathery appearance.
(d) Cumulus clouds are classified as high clouds.
3552: Emperor Harsha's southward march was stopped on the Narmada river by

(a) Pulakesin-I

(b) Pulakesin-II

(c) Vikramaditya-I

(d) Vikramaditya-II
3553: Flood hit areas are to be immediately given medical cover. Which of the following is the most appropriate step?

(a) BCG injection

(b) Inoculation against Cholera

(c) Smallpox vaccination

(d) None of these
3554: 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
3555: Consider the following statements:

1. The boundaries of a National Park are defined by legislation.

2. A Biosphere Reserve is declared to conserve a few specific species of flora and fauna.

3. In a Wildlife Sanctuary, limited biotic interference is permitted.

Which of the statements given above is /are correct ?

(a) 1 only
(b) 2 and 3 only
(c) 1, 2 and 3
(d) 1 and 3 only