Not a direct branch of arch of aoa ?
Branches of arch of aoa are :- i) Brachiocephalic trunk ii) Left common carotid aery iii) Left subclan aery Right common carotid aery and right subclan aery arise from brachiocephalic trunk (Brachiocephalic trunk divides into right common carotid and right subclan aeries).
Left common carotid aery
Left subclan aery
Brachiocephalic trunk
Right common carotid aery