<prompt> Vertebral artery arises from -1st part of subclavian artery2nd part of subclavian artery3rd part of subclavian artery4th part of subclavian artery  <response>: Ans. is a i.e., 1st part of subclavian artery Branches of subclavian arteryo 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. 