Which of the following artery is derivative of second aortic arch?
**Core Concept**
The second aortic arch is a crucial embryological structure that gives rise to several arteries, which eventually form part of the adult arterial system. The second aortic arch is involved in the development of the arterial system, particularly in the formation of the carotid arteries and the stapedial arteries.
**Why the Correct Answer is Right**
The correct answer is the stapedial artery, which is a derivative of the second aortic arch. The stapedial artery is a short-lived artery that appears during embryonic development, typically between the 6th and 8th weeks of gestation. It eventually regresses and gives rise to the internal carotid artery, the external carotid artery, and the maxillary artery. The stapedial artery plays a crucial role in the development of the arterial system, particularly in the formation of the carotid arteries and the stapedial muscles.
**Why Each Wrong Option is Incorrect**
**Option A:** The common carotid artery is a derivative of the first aortic arch, not the second. The common carotid artery is formed by the fusion of the first and second pharyngeal arches, but it is primarily derived from the first aortic arch.
**Option B:** The subclavian artery is a derivative of the third aortic arch, not the second. The subclavian artery is formed by the fusion of the third and fourth pharyngeal arches, but it is primarily derived from the third aortic arch.
**Option C:** The vertebral artery is a derivative of the first pharyngeal arch, not the second aortic arch. The vertebral artery is formed by the fusion of the first and second pharyngeal arches, but it is primarily derived from the first pharyngeal arch.
**Clinical Pearl / High-Yield Fact**
It is essential to remember that the embryological development of the arterial system is complex and involves the fusion of multiple pharyngeal arches and aortic arches. A thorough understanding of the embryological origins of the arterial system is crucial for understanding various congenital anomalies and vascular diseases.
**Correct Answer:** C. The stapedial artery.