4496: Superconductors are so called because they
(a) Efficiently conduct heat from one hot body to another
(b) Offer no resistance to conduction of heat at high temperatures
(c) Offer no resistance to conduction of electricity at low temperatures
(d) Produce high temperatures while conducting electricity
4497: Under which Article of the Indian Constitution did the President make a reference to the Supreme Court to seek the Court's opinion on the Constitutional validity of the Election Commission's decision on deferring the Gujarat Assembly elections (in the year 2002)?
(a) Article 142
(b) Article 143
(c) Article 144
(d) Article 145
4498: Seven men, A, B, C, D, E, F and G are standing in a queue in that order. Each one is wearing a cap of a different colour like violet, indigo, blue, green, yellow, orange and red. D is able to see in front of him green and blue but not violet. E can see violet and yellow, but not red. G can see caps of all colours other than orange. If E is wearing an indigo coloured cap, then the colour of the cap worn by F is
(a) blue
(b) violet
(c) red
(d) orange