This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharyngeal Arches, Subject name: Anatomy
4th Aoic arch is responsible for the formation of - 
Select and explain. 
A. Arch of aoa, B. Pulmonary aery, C. Pulmonary vein, D. Subclan vein
A: Arch of aoa
Answer: A: Arch of aoa 
Explanation: 4th arch aery forms aoic arch on left side and proximal pa of subclan aery on right side.