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
Major blood supply of pectoralis major muscles is 
Select and explain. 
A. Thoracoacromial trunk, B. Lateral thoracic aery, C. Internal mammary aery perforating branches, D. Axillary aery
A: Thoracoacromial trunk
Answer: A: Thoracoacromial trunk 
Explanation: Major blood Supply of Pectoralis major muscles is thoracoacromial trunk. The intercostal perforators arising from the internal mammary aery provide a segmental blood supply BD CHAURASIA'S HUMAN ANATOMY.VOLUME 1. 6TH EDITION.PAGE NO 180. TABLE A1.5:aeries of upper limb