4211: Put the following mass communication media in the sequence in which they came to India?
1. Radio
2. Television
3. Films
4. Printing
(a) 1, 3, 2, 4
(b) 1, 4, 3, 2
(c) 2, 4, 3, 1
(d) 4, 3, 1, 2
4212: Which one of the following layers of the atmosphere is responsible for the deflection of radio waves ?
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Ionosphere
4213: Consider the following statements :
I. Tides are of great help in navigation and fishing.
II. High tide enables big ships to enter or leave the harbour safely.
III. Tide prevents siltation in the harbours.
IV. Kandla and Diamond Harbour are tidal ports.
Which of these statements are correct ?
(a) I and IV
(b) II, III and IV
(c) I, II and III
(d) I, II, III and IV
4214: Which one of the following is another name of RDX ?
(a) Selenium
(b) Cyclonite
(c) Cyanohydrin
(d) Cyclohexane
4215: In which state is the Rajiv Gandhi National Institute of Youth Development located ?
(a) Himachal Pradesh
(b) Uttranchal
(c) Tamil Nadu
(d) Karnataka