The most densest substance on the Earth is __________.
The most densest substance on the Earth is __________.
		A. Platinum
B. Copper
C. Steel
D. Osmium
		A. Platinum
B. Copper
C. Steel
D. Osmium
Which gland in the human body is called the master gland?
		A. Pancreas
B. Thyroid
C. Pituitary
D. Spleen
		A. 4
B. 5
C. 6
D. 8 
The number of spark plugs needed in a diesel engine is__________?
		A. 2
B. 3
C. 0
D. 4
E. None of these
A.	Brucine
B.	Caffeine
C.	Phenylalanine
D.	Theine