4346: Optical fibre works on the principle of
(a) total internal reflection
(b) refraction
(c) scattering
(d) interference
4347: Among the following major stock exchanges of India, the exchange which recorded highest turnover during the year 2001-01 is
(a) Bombay Stock Exchange
(b) Calcutta Stock Exchange
(c) Delhi Stock Exchange
(d) National Stock Exchange
4348: Sendeep Pandey, the winner of Raman Magsaysay Award, is mainly an activist in
(a) prevention of child marriages
(b) promotion of communal harmony
(c) environmental protection
(d) education and livelihood projects for Dalits
4349: Who among the following is known for his work on medicine during the Gupta period ?
(a) Saumilla
(b) Sudraka
(c) Shaunaka
(d) Susrutha
4350: A conveyer belt delivers baggage at the rate of 3 tons in 5 minutes, and a second conveyer belt delivers baggage at the rate of 1 ton in 2 minutes. How much time will it take to get 33 tons of baggage delivered using both the conveyer belts ?
(a) 25 minutes and 30 seconds
(b) 30 minutes
(c) 35 minutes
(d) 40 minutes and 45 seconds