46: With reference to the mineral resources of India, consider the following pairs:
Mineral : 90% Natural sources in
1. Copper : Jharkhand
2. Nickel : Orissa
3. Tungsten : Kerala
Which of the pairs give above is/are correctly matched?
(a) 1 and 2 only
(b) 2 only
(c) 1 and 3 only
(d) 1, 2 and 3
47: Optical fibre works on the principle of
(a) total internal reflection
(b) refraction
(c) scattering
(d) interference
48: Consider the following passage:
In the course of a career on the road spanning almost thirty years, he crossed the breadth of the Eastern hemisphere, visited territories equivalent to about 44 modern countries, and put behind him a total distance of approximately 73,000 miles.
The world's greatest traveller of pre-modern times to whom the above passage refers is
(a) Megasthenes
(b) Fa-Hien
(c) Marco Polo
(d) Ibn Battuta
49: Mahatma Gandhi Setu is built over the river:
(a) Ganga
(b) Brahmaputra
(c) Godavari
(d) Cauvery
50: Which one of the following duties is NOT performed by the Comptroller and Auditor General of India ?
(a) To audit and report on all expenditure from the Consolidated Fund of India
(b) To audit and report on all expenditure from the Contingency Funds and Public Accounts
(c) To audit and report on all trading, manufacturing, profit and loss accounts
(d) To control the receipt and issue of public money, and to ensure that the public revenue is lodged in the exchequer