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What is Vertebral artery arises from - and explain in detail?
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'.