421: Phytotron is a facility to
(a) grow plants under disease-free conditions
(b) conserve endangered species of plants
(c) grow plants under controlled conditions
(d) induce mutations
422: Who led the extremists before the arrival of Gandhiji on the political scene for freedom struggle?
(a) Bal Gangadhar Tilak
(b) Dadabhai Naoroji
(c) Gopal Krishna Gokhale
(d) Subhash Chandra Bose
423: Cryogenic engines find applications in
(a) sub-marine propulsion
(b) frost-free refrigerators
(c) rocket technology
(d) researches in superconductivity
424: Which one of the following books of ancient India has the love story of the son of the founder of Sunga dynasty?
(a) Swapnavasavadatta
(b) Malavikagnirnitra
(c) Meghadoota
(d) Ratnavali
425: What causes wind to deflect toward left in the Southern hemisphere ?
(a) Rotation of the earth
(b) Magnetic field
(c) Temperature
(d) Pressure