2166: In the structure of planet Earth, below the mantle, the core is mainly made up of which one of the following?
(a) Aluminium
(b) Silicon
(c) Iron
(d) Chromium
2167: Assertion (A)
In 1946 in Bombay the ratings of the Royal Indian Navy rose in open mutiny against the British
Reason (R)
The Royal Indian Navy joined the INA
(a) A and R both are incorrect
(b) A is correct but R is incorrect
(c) A and R are correct and R is the correct explanation of A
(d) A and R are correct but R is not the correct explanation of A
2168: The light from the Sun reaches the Earth in about
(a) 2 min
(b) 4 min
(c) 6 min
(d) 8 min
2169: In an objective test there are 60 questions. Each question carries four alternative answers only one of which is correct. Suppose A and B are two candidates both of whom know correct answers to 30 questions. A answers only 30 questions while B answers all 60 questions choosing answers at random for those he does not know the answers of. If each question carries a mark of 1 and no negative marks are awarded, the marks obtained by B are expected to be larger than those obtained by A by
(a) 0
(b) 15
(c) 5
(d) 7.5
2170: The Balkan Plan for fragmentation of India was the brain-child of
(a) W. Churchill
(b) M. A. Jinnah
(c) Lord Mountbatten
(d) V. P. Menon