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13.	Arteries supplying blood to the heart are called
	A.  Carotid arteries
	B.  Coronary arteries
	C.  Pulmonary arteries
	D.  Hepatic arteries

Answer

Ans: B Coronary arteries

14.	The blue baby pollution disease is due to the excessive presence of which of the following in drinking water?
	A.  Arsenic
	B.  Fluoride
	C.  Chloride
	D.  Nitrate

Answer

Ans: D Nitrate

15.	Which one of the following human organs is less susceptible to harmful radiations?
	A.  Eyes
	B.  Eyes
	C.  Lungs
	D.  Brain

Answer

Ans: C Lungs

16.	The disease caused by swelling of the membrane over spinal cord and brain is
	A.  Sclerosis
	B.  Paralysis
	C.  Leukaemia
	D.  Meningitis

Answer

Ans: D Meningitis