1671: The basic reason for the extraordinary sparkle of a suitably cut diamond is that
(a) it has a very high transparency
(b) it has a very high refractive index
(c) it is very hard
(d) it has well-defined cleavage planes
1672: 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
1673: Malaria fever is caused
(a) Immediately after mosquito bite
(b) Upon disintegration and bursting of red blood cells
(c) When the malaria causing germs reach the liver
(d) Upon release of toxins into blood
1674: Stiglitz Commission established by the President of the United Nations General Assembly was in the international news. The commission was supposed to deal with
(A) Expansion of the United Nations Security Council in the present global scenario
(B) Global terrorism and prepare a global action plan for the mitigation of terrorism
(C) The challenges posed by the impending global climate change and prepare a road map
(D) The workings of the global financial systems and to explore ways and means to secure a more sustainable global order
1675: Arrange the following in proper sequence
(i) Vinayapitaka
(ii) Gita Govinda
(iii) Raghuvansha
(iv) Atharvaveda
(a) (iii), (ii), (i), (iv)
(b) (iv), (iii), (ii), (i)
(c) (iv), (i), (iii), (ii)
(d) (ii), (iv), (iii), (i)