Internal thoracic artery is a branch of -: (A) 1st part of subclavian artery, (B) 2nd part of subclavian artery, (C) 3rd part of subclavian artery, (D) Thyrocervical trunk
Answer is A. Ans. is 'a' i.e., 1st part of subclavian artery Ref: BDC Vol III 5th/e p. 179]Branches of subclav ian artery :-o 1st Part - Vertebral artery, internal thoracic artery, thyrocervical trunk, and on left side costocervical trunk,o 2nd Part -On right side costocervical trunk,o 3rd Part - Dorsal scapular artery.