71) Trachoma is the disease of?
(A) Liver
(B) Brain
(C) Eye
(D) Heart
72) Gas used in balloons is
(A) Helium
(B) Nitrogen
(C) Oxygen
(D) Carbon di oxide
73) The stimulant which is present in tea leaves is called?
(A) Brucine
(B) Caffeine
(C) Theine
(D) Phosphorous