50.  Who discovered North Pole ?
A. Robert Peary
B. Amundsen
C. Tasman
D. John Cabot

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51.  Who invented 'Helicopter'?
A. Cockrell
B. Brequet
C. Otis
D. Frank Whittle

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52.  Who invented Penicillin ?
A. William Harvey
B. Louis Pasteur
C. Alexander Fleming
D. Edward Jenner

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53.  Who invented aeroplane ?
A. Orville Wright and Wilbur Wright
B. Sir Frank Whittle
C. Michael Faraday
D. Christian Huygens

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54.  Who invented Penicillin?
A. William Harvey
B. Louis Pasteur
C. Alexander Fleming
D. Edward Jenner

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55.  The causative virus of AIDS was isolated in the year of
A.1980
B.1981
C.1983
D.1986

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56.  Who discovered electromagnetic nature of light ?
A. Snell
B. Newton
C. Maxwell
D. Young

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