A rotor weighing 2 kN is supported on bearings A and B which are 1m apart. The centre of mass of the rotor is at a distance 0.4 m from bearing A. It is observed that there is an unbalanced couple of magnitude 300 N – m which leaves the shaft balanced statically. The dynamic reactions at the supports will be
(a) 800N and 800N
(b) 300N and 800N
(c) 800N and -300N
(d) 300N and -300N