The provisions of section 126 of the Evidence Act dealing with confidentiality of professional communication shall apply to

Section 126 of the Evidence Act provides professional privilege for confidential communications between barristers and their clients. The section expressly states that this privilege extends to barristers' clerks, servants of pleaders (lawyers), and interpreters of barristers - all persons acting under the lawyer's authority in professional capacity. This extension is crucial because lawyers' staff routinely handle confidential client communications. Section 126 ensures that the privilege covers the entire professional team, not just the lawyer personally. Option D 'All of the above' is correct.