If A and B are two events such that $P ( A \cup B) = \large\frac{5}{6}, \: P ( A \cap B ) = \large\frac{1}{3} \: and \: P(B') = \large\frac{1}{2}$ then events A and B are

Question

$\begin {array} {1 1} (1)\;dependent & \quad (2)\;independent \\ (3)\;mutually\: exclusive & \quad (4)\;none\: of \: these \end {array}$