The Bar Council of India Rules place specific restrictions on Senior Advocates. They cannot:
Accept instructions to draft pleadings or affidavits.
Accept a brief directly from a client; they must be instructed by an Advocate-on-Record or a junior advocate.
Make concessions on behalf of a client without their express authority. Acting on instructions from a junior is not sufficient for making concessions.
Essentially, a Senior Advocate's role is primarily to argue a case based on the brief prepared by another advocate. Therefore, none of the actions listed in options A, B, and C are permitted.