This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
Upper two posterior intercostal aeries arise from 
Select and explain. 
A. Aoa, B. Superior intercostal aery, C. Internal mammary aery, D. Bronchial aery
B: Superior intercostal aery
Answer: B: Superior intercostal aery 
Explanation: First and second posterior intercostal aeries arise from superior intercostal aery B D CHAURASIA&;S HUMAN ANATOMY UPPER LIMB THORAX-VOLUME-1 SIXTH EDITION,Page no-219