A. Art of performing acrobatic feats
B. Art of flying
C. Study of sound
D. Branch of mechanic that deals with notion of air and other gases

A. His discovery of heavenly bodies
B. His discovery that the sun is the centre of the universe
C. (Both (a) and (b)
D. None of the above

A. Line from north to south
B. South to north
C. North to west
D. None of these

A. 250 meters
B. 434 meters
C. 331 meters
D. 561 meters

A. Copernicus
B. Newton
C. Galileo
D. None of the above

A. Telecommunication system
B. Eye operation
C. Air raid system
D. Defence system

A. James Harrison
B. Hemingway
C. Fulton
D. None of above

A. Swinston
B. Robert William
C. Zanzibar
D. None of above

A. William Congreve
B. Edison
C. Honda
D. None of above

A. Lord Rutherford
B. Marconi
C. Edison
D. None of above