2106: Optical fibre works on the principle of
(a) total internal reflection
(b) refraction
(c) scattering
(d) interference
2107: The stones formed in human kidney consist mostly of
(a) calcium oxalate
(b) sodium acetate
(c) magnesium sulphate
(d) calcium
2108: Consider the following programmes :
I. Afforestation and development of wastelands.
II. Reforestation and replantation in existing forests.
III. Encouraging the wood substitutes and supplying other types of fuel.
IV. Promotion of wide use of insecticides and pesticides to restrict the loss of forest area from degradation caused by pests and insects.
The National Forest Policy of 1988 includes
(a) I, II, III and IV
(b) II and IV
(c) I, III and IV
(d) I, II and III
2109: The problem of international liquidity is related to the non-availability of
(a) goods and services
(b) gold and silver
(c) dollars and other hard currencies
(d) exportable surplus
2110: Consider the following statements in respect of financial emergency under Article 360 of the Constitution of India:
1. A Proclamation of financial emergency issued shall cease to operate at the expiration of two months, unless before the expiration of that period it has been approved by the resolution of both houses of Parliament.
2. If any proclamation of financial emergency is in operation, it is competent for the president of India to issue directions for the reduction of salaries and allowances of all or any class of persons serving in connection with the affairs of the Union but excluding the Judges of the Supreme Court and the High Courts.
Which of the statements given above is/are correct ?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2