# Which of the following is not an important division of subclavian artery?
A. Thyrocervical trunk
B. Internal thoracic artery
C. Carotid artery
D. Vertebral artery
The correct answer is C. Carotid artery.
A. VERTEBRAL ARTERY: Supplies the brain.
B. INTERNAL THORACIC ARTERY: Descends to supply the diaphragm and terminates as the superior epigastric artery, which helps to supply the abdominal wall.
C. THYROCERVICAL OR CERVICOTHYROID TRUNK: Divides into three arteries- the transverse cervical artery, suprascapular artery and the inferior thyroid artery.
D. COSTOCERVICAL TRUNK: divides into two branches- the superior intercostals and deep cervical arteries, which supply muscles of intercostal spaces.
E. DORSAL SCAPULAR ARTERY: supplies the muscles of the scapular region.
Carotid artery is not a part of subclavian artery.
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