2741: Pumice is derived from:
(a) Volcanic rock
(b) Sedimentary rock
(c) Igneous rock
(d) Acid lava
2742: In a tournament 14 teams play league matches. If each team plays against every other team once only then how many matches are played ?
(A) 105
(B) 78
(C) 85
(D) 91
2743: Nobel Prize winning scientist James D. Watson is known for his work in which area ?
(a) Metallurgy
(b) Genetics
(c) Environmental protection
(d) Meteorology
2744: The Buddhist sect Mahayana formally came into existence during the reign of
(a) Ajatashatru
(b) Ashoka
(c) Dharmapala
(d) Kanishka
2745: In ancient Indian Buddhist monasteries, a ceremony called Pavarana used to be held. It was the
(a) occasion to elect the Sanghaparinayaka and two speakers one on Dhamma and the other on Vinaya
(b) confession by monks of their offences committed during their stay in the monasteries during the rainy season
(c) ceremony of initiation of new person into the Buddhist Sangha in which the head is shaved an when yellow robes are offered
(d) gathering of Buddhist monks on the next day to the full moon day of Ashadha when they take up affixed abode for the next four months or rainy season