(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: The sum of two vectors can be zero.
Reason : The vector cancel each other, when they are equal and opposite.