<prompt> Which of the following aeries supply pectoralis major muscle?1. Pectoral branches of thoracoacromial aery2. Intercostal aery3. Lateral thoracic aery4. Subclan aery5. Internal mammary aery1, 2 32, 3 41, 2 51, 2, 4 5  <response>: Blood supply of pectoralis major: Pectoralis major derives it blood supply mainly from pectoral branch of the thoracoacromial aery.Other aeries supplying the muscle are: First perforating branch of the internal thoracic aery Internal mammary aery and intercostal aery. 