The correct option is D 6
At least two-thirds of the Directors of a public company or of a private company subsidiary of a public company have to retire by rotation and the term "rotational Director" refers to such Directors who have to retire and one-third of these two-thirds of directors may be eligible for re-appointment at the end of his or her tenure. Therefore, XYZ Ltd. had 8 directors and hence directors liable to retire by rotation should be 2/3 of 8 i.e. 5.33 which is rounded off to 6.