<prompt> Which of the following is not supplied by the right coronary aery?SA nodeAV nodeAV bundleRight bundle branch  <response>: Right coronary aery supplies whole of the conducting system of the hea except a pa of the left branch of the AV bundle. REF. BD CHAURASIAS HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 SIXTH EDITION, Page no-263 