Select the correct option from the given alternatives: The principal solutions of equation `sintheta =frac{-1}{2}` are….... a) `frac{5pi}{6},frac{pi}{6}` b) `frac{7pi}{6},frac{11pi]{6}` c) `frac{pi}{6},frac{7pi}{6}` d) `frac{7pi}{6}, frac{pi}{6}`

Options

A. `frac{5pi}{6},frac{pi}{6}`
B. `frac{7pi}{6},frac{11pi]{6}`
C. `frac{pi}{6},frac{7pi}{6}`
D. `frac{7pi}{6},{pi}{6}`