A. Cross product is zero

B. Dot product is zero

C. Both are zero

D. Both are not necessarily zero

Dapzoi

Answer: A

Explanation: Dot product of two perpendicular vectors is given by A.B = |a||b|cos 90, which is zero. Thus, dot product is zero and vectors are perpendicular.

Explanation: Dot product of two perpendicular vectors is given by A.B = |a||b|cos 90, which is zero. Thus, dot product is zero and vectors are perpendicular.