Assertion: A molecule of butane, `C_(4)H_(10)` has a mass of `58.12 amu`.
Reason: One mole of butane contains `6.022xx10^(23)` molecules and has a mass of `58.12 g`.
A. (a)If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. (b)If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. (c )If assertion is true but reason is false.
D. (d)If assertion is false but reason is true.