The correct option is C 5
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 7 directors and hence directors liable to retire by rotation should be 2/3 of 7 i.e. 4.67 which is rounded of as 5.