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41.	Penicillin was invented by Fleming in the year
	A. 1842 B. 1929 C. 1945 D. 1951

42.	Fax machine was invented by
	A. Daimler B. Dewar C. Bain D. None of these

43.	Crescograph is an instrument to record
	A. age of earth B. plant growth C. the age of star D. none of these

44.	The most abundant element on the earth crust is
	A. calcium B. aluminium C. silicon D. oxygen

45.	Deficiency of iodine cause
	A. fever B. thyroid malfunction C. indigestion D. skin disease

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