Pathology Based on the appearance of these two siblings, which pharyngeal arch appears to be most affected? A Pharyngeal arch 1 B Pharyngeal arch 2 C Pharyngeal arch 3 D Pharyngeal arch 4 💡 Explanation Based on the appearance of these two siblings, which pharyngeal arch appears to be most affected? ✓ Correct Answer: A. Pharyngeal arch 1