3281: In India, the steel production industry requires the import of
(a) saltpetre
(b) rock phosphate
(c) coking coal
(d) All of the above
3282: 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
3283: The concept of carbon credit originated from which one of the following?
(a) G-8 Summit, Heiligendamm
(b) Montreal Protocol
(c) Kyoto Protocol
(d) Earth Summit, Rio de Janeiro
3284: The time in the wall-clock is 3.25 the acute angle between the hours-hand and the minutes-hand is
(a) 60°
(b) 52 ½°
(c) 47 ½°
(d) 42°
3285: Which one of the following dynasties was ruling over North India at the time of Alexander's invasion ?
(a) Nanda
(b) Maurya
(c) Sunga
(d) Kanva