Assertion: `vec(A)xxvec(B)` is perpendicualr to both `vec(A)-vec(B)` as well as `vec(A)-vec(B)`
Reason: `vec(A)xxvec(B)` as well as `vec(A)-vec(B)` lie in the plane containing `vec(A)` and `vec(B)`, but `vec(A)xxvec(B)` lies perpendicular to the plane containing `vec(A)` and `vec(B)`.
A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false.
D. If both aseertion and reason are false.