From two points x and y, 8m apart, and in line with a pole, the angle of elevation of the top of the pole are 30^o and 60^o respectively. Fins the height of the pole assuming that x, y and the foot of the pole are the same horizontal plane and x and y are on the same side of the pole.

A. $\sqrt{6}$
B. 4$\sqrt{3}$  
C. $\sqrt{3}$
D. $\frac{12}{\sqrt{3}}$

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Correct Answer: B