Inner layer of blast furnace is made of [MP PMT 1990]

1.	Inner layer of blast furnace is made of [MP PMT 1990]
A.	Graphite bricks
B.	Silica bricks
C.	Fire- clay bricks
D.	Basic bricks
Answer» D. Basic bricks

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Inner layer of blast furnace is made of [MP PMT 1990]

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