2456: Protective action against harmful household insects and pests can be taken by the use of
(a) Infrasonic waves
(b) Microwaves
(c) Ultrasonic waves
(d) Low frequency radio waves
2457: In India, during the last decade the total cultivated land for which one of the following crops has remained more or less stagnant ?
(a) Pulses
(b) Oilseeds
(c) Rice
(d) Sugarcane
2458: Who among the following Governors- General introduced the Dual System of Government?
(a) Lord Wellesley
(b) Lord Canning
(c) Lord Clive
(d) Lord Rippon
2459: In a parliamentary system the executive is responsible:
(a) Directly to the people
(b) To legislature
(c) To judiciary
(d) None of the above
2460: Olympics 2000 is to be held in
(a) Johannesberg
(b) Capetown
(c) Rome
(d) Sydney