In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices:

Assertion : Nickel can be purified by Mond process.

Reason : Ni(CO)₄ is a volatile compound which decomposes ate 460K to give pure Ni.

Both assertion and reason are true and the reason is the correct explanation of the assertion.

Nickel is heated in a stream of carbon monoxide forming a volatile complex nickel tetracarbonyl which on further decomposition gives pure Ni. This process is called Mond process.