<prompt> Third coronary aery is -Right coronary aeryLeft coronary aeryConus aeryAnterior interventricular aery  <response>: Ans. is c i.e.,Conus aeryThird coronary aery is seen only in 50 of human heas. It is also called conus aery.The conus aery is a small early branch off the right coronary aery RCA circulation. 