The Point $P ( x , y )$ Is on the Unit Circle in Quadrant III

Multiple Choice

The point $P ( x , y )$ is on the unit circle in quadrant III. If $x = - \sqrt { 11 } / 6$
Find y

A) $y = \sqrt { 11 } / 6$
B) $y = \sqrt { 5 } / 6$
C) $y = 11 / 6$
D) $y = 5 / 6$
E) $y = - 5 / 6$