Assertion. But-2-yne on reduction with `Na//NH_3(l)` gives trans-2-butene
Reason. To minimise interelectronic repulsions, the addition of electrons occurs on the opposite faces of the triple bond.
A. If both assertion and reason are true, and reason is the true explanation of the assertion.
B. If both assertion and reason are true, but reason is not the true explanation of the assertion.
C. If assertion is true, but reason is false.
D. If both assertion and reason are false