171: The Montague-Chelmsford Proposals were related to
(a) social reforms
(b) educational reforms
(c) reforms in police administration
(d) constitutional reforms
172: Metals known to Indus Valley Civilisation were:
(a) Gold, copper, silver but not iron
(b) Silver, iron, bronze but not gold
(c) Iron, copper, gold but not silver
(d) Zinc, silver, iron but not gold
173: Isotopes of the same element differ in the number of:
(a) Protons
(b) Neutrons
(c) Electrons
(d) Positrons
174: The Muslims march seven times round the Kaaba as path of their Haj pilgrimage in the city of:
(a) Riyadh
(b) Mecca
(c) Rabat
(d) Jeddah
175: Which one of the following is the best strategy for environment-friendly sustainable development in Indian agriculture?
(a) Expansion of cultivable land, increased use of superphosphate, urea and effective biocides
(b) Wider popularization of high-yielding crop varieties, better and more frequent irrigation and increased frequency of aerial sprays of inorganic fertilizers and pesticides
(c) Mixed cropping, organic manures, nitrogen-fixing plants and pest resistant crop varieties
(d) Improved farm implements and machinery, use of potent insecticides to minimise post-harvest grain losses and mono culture cropping practices