Which of the following statements relating to the Grievance Redressal Machinery envisaged under Chapter II of the Industrial Disputes Act, 1947 are correct?
    (a)    Every industrial establishment employing twenty or more workmen shall have one or more Grievance Redressal Committee for the resolution of disputes arising out of individual grievances. 
    (b)    The Grievance Redressal  Committee shall consist of equal number of members from the employer and the workmen. 
    (c)    The total number of member of the Grievance Redressal Committee shall not exceed more than four. 
    (d)    The Grievance Redressal Committee may complete its proceedings within thirty days of receipt of an application by or on behalf of the aggrieved party. 
    Select correct option :