Assertion: Limestone addes in the blast furance decomposes to give CaO which forms slag in molten state and separates out from iron
Reason : The iron obtained from the blast furnace contains about 4% carbon and many impurities like S,P,Si, Mn, etc.
A. If both assertion and reason are true and reason is the correct explanation of assertion .
B. if both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.
