Assertion `:` The central carbon`-`carbon bond in `1, 3-`butadiene is shorter than `n`-butane.
Reason `:` In butadiene the central bond has `sp^(2)-sp^(2)` nature whereas in butane it is `sp^(3)-sp^(3)`.
A. If both the assertion and reason are true and reason is the true explanation of the assertion .
B. If both the assertion and reason are true bu the reason is not the correct explanation of assertion.
C. If the assertion is true but reason is false.
D. If assertion is false but reason is true.

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