A

\[\left\{\frac{\pi}{3};\frac{\pi}{2};\frac{2\pi}{3}\right\}\]

B

\[\left\{\frac{\pi}{4};\frac{\pi}{2};\frac{3\pi}{4}\right\}\]

C

\[\left\{\frac{\pi}{6};\frac{\pi}{2};\frac{5\pi}{6}\right\}\]

D

\[\left\{\frac{\pi}{5};\frac{\pi}{2};\frac{4\pi}{5}\right\}\]

E

\[\left\{\frac{\pi}{3};\frac{2\pi}{3};\frac{5\pi}{6}\right\}\]