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
True about anterior intercostal aery 
Select and explain. 
A. Present in 1st to 11th intercostal space, B. Each intercostal space has two anterior intercosta aeries, C. Branch of internal thoracic aery, D. Branch of aoa
C: Branch of internal thoracic aery
Answer: C: Branch of internal thoracic aery 
Explanation: The anterior intercostal branches of internal thoracic aery supply the upper five or six intercostal spaces. BD CHAURASIA&; S HUMAN ANATOMY UPPER LIMB THORAX VOL I SIXTH EDITION PAGE NO223