Which of the following pairs gives a correct combination of the useful – McqOptions

MCQOPTIONS

1.	Which of the following pairs gives a correct combination of the useful and harmful constituentsrespectively of a good brick earth?
A.	Lime stone and alumina
B.	Silica and alkalies
C.	Alumina and iron
D.	Alkalies and magnesium
Answer» C. Alumina and iron

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