46: With reference to Simon Commission's recommendations, which one of the following statements is correct ?
(a) It recommended the replacement of diarchy with responsible government in the provinces
(b) It proposed the setting up of interprovincial council under the Home Department
(c) It suggested the abolition of bicameral legislature at the centre
(d) It recommended the creation of Indian Police Service with a provision for increased pay and allowances for British recruits as compared to Indian recruits
47: The growth rate of per capita income at current prices is higher than that of per capita income at constant prices, because the latter takes into account the rate of
(a) growth of population
(b) increase in price level
(c) growth of money supply
(d) increase in the wage rate
48: Which one of the following can be used to confirm whether drinking water contains a gamma emitting isotope or not?
(a) Microscope
(b) Lead plate
(c) Scintillation counter
(d) Spectrophotometer
49: The Harappans did not know the use of
(a) Bronze
(b) Gold
(c) Iron
(d) Silver
50: The offending substance in the liquor tragedies leading to blindness, etc. is
(a) ethyl alcohol
(b) amyl alcohol
(c) benzyl alcohol
(d) methyl alcohol