Assertion : Zirconium can be purificed by Van Arkel method.
Reason : `ZrI_(4)` is volatile and decomposed at `1800 K`.

Options

A. Both assertion and reason are true and reason is the correct explanation of asserton.
B. Both assertion and reason are true but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false
D. Assertion is flase but reason is true