The correct answer is option 1 i.e. One of the independent members of the Board.Central Advisory Board - For the purpose of advising the Central and state governments in the matters of the fixation and revision of minimum rates of wages and other matters under section 8 of Minimum wage Act and for coordinating the work of the Advisory Board, the Central Government shall appoint a Central Advisory Board.The Central Advisory Board shall consist of persons to be nominated by the Central Government representing employers and employees in SCHEDULE employment, who shall be equal in number.An independent person not exceeding one-third of its total number of members; one of such independent persons shall be appointed the Chairman of the Board by the Central Government. Hence option 1 is correct.The Union Cabinet has approved the Wage Code Bill 2019, which raised the national minimum wage by Rs. 2 to Rs. 178 per day but the internal labour ministry committee recommended a much higher amount of Rs. 375.