Assertion: Durig calcination the ore is heated well below its melting point in the limited supply of air or absence of air.
Reason: The process of calcination is carried out for sulphide ores.
A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.
