Upper two posterior intercostal aeries arise from ?
Ans. B) Superior intercostal aeryThe 1st and 2nd posterior intercostal aeries arise from the supreme intercostal aery, a branch of the costocervical trunk of the subclan aery. The lower nine aeries are the aoicintercostals, so called because they arise from the back of the thoracic aoa.
Aoa
Superior intercostal aery
Internal mammary aery
Bronchial aery