50. Who discovered North Pole ?
A. Robert Peary
B. Amundsen
C. Tasman
D. John Cabot
51. Who invented 'Helicopter'?
A. Cockrell
B. Brequet
C. Otis
D. Frank Whittle
52. Who invented Penicillin ?
A. William Harvey
B. Louis Pasteur
C. Alexander Fleming
D. Edward Jenner
53. Who invented aeroplane ?
A. Orville Wright and Wilbur Wright
B. Sir Frank Whittle
C. Michael Faraday
D. Christian Huygens
54. Who invented Penicillin?
A. William Harvey
B. Louis Pasteur
C. Alexander Fleming
D. Edward Jenner
55. The causative virus of AIDS was isolated in the year of
A.1980
B.1981
C.1983
D.1986
56. Who discovered electromagnetic nature of light ?
A. Snell
B. Newton
C. Maxwell
D. Young
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