4341: When a CD (Compact Disc used in audio and video systems) is seen in sunlight, rainbow like colours are seen. This can be explained on the basis of the phenomenon of
(a) reflection and diffraction
(b) reflection and transmission
(c) diffraction and transmission
(d) refraction, diffraction and transmission
4342: Mixed farming means:
(a) Simultaneous cultivation of a number of crops in a single field
(b) Alternate cropping in a field
(c) Growing fruits and vegetables in the same field
(d) None of these
4343: With reference to organic farming in India, consider the following statements:
1. The National Programme for Organic Production' (NPOP) is operated under the guidelines and directions of the Union Ministry of Rural Development.
2. The Agricultural and Processed Food Products Export Development Authority' (APEDA) functions as the Secretariat for the implementation of NPOP.
3. Sikkim has become India's first fully organic State.
Which of the statements given above is/are correct?
(a) 1 and 2 only
(b) 2 and 3 only
(c) 3 only
(d) 1, 2 and 3
4344: Distribution of electric power from one place to another is done at high A.C. voltage because:
(a) Wastage of electricity is minimised
(b) Stealing of electric wires is prevented
(c) Electricity spreads in very short time
(d) It adds brightness
4345: With reference to Indian freedom struggle, consider the following events:
1. Mutiny in Royal Indian Navy
2. Quit India Movement launched
3. Second Round Table Conference
What is the correct chronological sequence of the above events ?
(a) 1-2-3
(b) 2-1-3
(c) 3-2-1
(d) 3-1-2