41: Chemical composition of pearl is:
(a) Calcium carbonate
(b) Calcium carbonate and magnesium carbonate
(c) Calcium sulphate
(d) Calcium chloride
42: The term of the Lok Sabha
(a) cannot be extended under any circumstances
(b) can be extended by six months at a time
(c) can be extended by one year at a time during the proclamation of emergency
(d) can be extended for two years at a time during the proclamation of emergency
43: Atoms of the same element having the same atomic number but different atomic weight are called
(a) Isobars
(b) Isotopes
(c) Polymers
(d) Isomers
44: If there is any disagreement between the Senate and the House of Representatives in USA, it is resolved by
(a) The President
(b) The Vice-President
(c) The Speaker
(d) Conference committee consisting of 3 to 9 members from each House
45: Human Development Index comprises literacy rates, life expectancy at birth and
(a) Gross Domestic Product per head in US dollars
(b) Gross Domestic Product per head at real purchasing power
(c) Gross National Product in US dollars
(d) National Income per head in US dollars