Given points O(0,0), A(4, 12), and B(-9,3), are OA and OB perpendicular?*
A. OA and OB are perpendicular because ala2+b1b2=0.
B. OA and OB are not perpendicular because a1 b1+ a2b270
C. OA and OB are perpendicular because al b1+ a2b2 =0.
D. OA and OB are not perpendicular because ala2+b1b280.
This is a required question