2156: Poison glands of snakes are homologous to
(a) electric organs of fishes
(b) stings of rays
(c) sebaceous glands of mammals
(d) salivary glands of vertebrates
2157: Gilt-edged market means
(a) bullion market
(b) market of Government securities
(c) market of guns
(d) market of pure metals
2158: What is the purpose of the US Space Agency's Themis Mission, which was recently in the news?
(a) To study the possibility of life on Mars
(b) To study the satellites of Saturn
(c) To study the colourful display of high latitude skies
(d) To build a space laboratory to study the stellar explosions
2159: A point is selected at random inside a rectangle and perpendiculars are drawn on each side from the point. The sum of these perpendiculars is 24 cm. If the length of the rectangle is 3 times the width, the perimeter of the rectangle will be
(a) 36 cm
(b) 42 cm
(c) 24 cm
(d) 48 cm
2160: With reference to the invaders in ancient India, which one of the following is the correct chronological order ?
(a) Greeks - Sakas - Kushans
(b) Greeks - Kushans - Sakas
(c) Sakas - Greeks - Kushans
(d) Sakas - Kushans - Greeks