If the equation for the displacement of a particle moving on a circular path is given by θ = 2t3 + 0.5 where θ is in radians and t in seconds, then the angular velocity of the particle at t = 2 sec is
(a) 24 rad/sec
(b) 12 rad/sec
(c) 8 rad/sec
(d) 36 rad/sec
