Which of the following is/are not a recommended practice(s) in the King IV Code? a. The chairperson of the board's appointment should be confirmed every two years b. The chairperson should be an independent non-executive director c. The chairperson should have served as the lead independent noc-executive director prior to being appointed as the chairperson d. A retiring CEO should not be eligible for appointment as chairperson until a period of 5 years since his retirement has elapsed