Which of the following sets of points are vertices of a right triangle?
Your answer:
O A(-1,-3), B(4, -3), C(2, -1)
O A(-2, 2), B(1, -4), C(4, 2)
O A(-1, 1), B(3,5), C(4, -4)
OA(-1,3), B(-4,-3), C(-4,1)