This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen: Miscellaneous, Subject name: Anatomy
FALSE about subclan aery: 
Select and explain. 
A. On left side arises from arch of aoa, B. On right side arises from brachiocephalic trunk, C. Veebral aery arises from 2nd pa, D. Divided by scalenus anterior muscle into three pas
C: Veebral aery arises from 2nd pa
Answer: C: Veebral aery arises from 2nd pa 
Explanation: Veebral aery arises from 1st pa of subclan aery. On the left side subclan aery comes directly off the aoic arch, while on the right side it arises from the brachiocephalic trunk. Scalenus anterior muscle divides subclavain aery into three pas. Branches: 1st Pa: Veebral aery Internal thoracic aery Thyrocervical trunk 2nd Pa: Costocervical aery 3rd Pa: Dorsal scapular aey