(a) If both assertion and reason are true and the reason is the cor...

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.
(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.
(c) If assertion is true but reason is false.
(d) If the assertion and reason both are false.
(e) If assertion is false but reason is true.
Assertion : If dot product and cross product of \( \vec{A} \) and
\( \vec{B} \) are zero, it implies that one of the vector
\( \vec{A} \) and \( \vec{B} \) must be a null vector.
Reason : Null vector is a vector with zero magnitude.