Question 83167
It's the first one (A)
That's because the product of the gradients (slopes) of two perpendicular lines must be -1.

In the first case:
the gradient of the first line = {{{2/8=1/4}}}
and the gradient of the second line = {{{12/3=4}}}

since both gradients are positive then they cannot give a product of -1, and therefore are not perpendicular.