231: In typhoid which of the following drugs is administered?
(a) Chloromycetin
(b) Penicillin
(c) Sulphonamide
(d) Tetracycline
232: One consistent feature found in the history of southern India was the growth of small regional kingdoms rather than large empires because of
(a) the absence of minerals like iron
(b) too many divisions in the social structure
(c) the absence of vast areas of fertile land
(d) the scarcity of manpower
233: In the context of which of the following do some scientists suggest the use of cirrus cloud thinning technique and the injection of sulphate aerosol into stratosphere?
(a) Creating the artificial rains in some regions
(b) Reducing the frequency and intensity of tropical cyclones
(c) Reducing the adverse effects of solar wind on the Earth
(d) Reducing the global warming
234: Which one of the following types of coal contains a higher percentage of carbon than the rest ?
(a) Bituminous coal
(b) Lignite
(c) Peat
(d) Anthracite
235: In a bisexual flower, if androecium and gynaecium mature at different times, the phenomenon is know as
(a) Dichogamy
(b) Herkogamy
(c) Heterogamy
(d) Monogamy