**Core Concept**
The double aortic arch is a rare congenital anomaly where the aortic arch is duplicated, resulting in a vascular ring that encircles the trachea and esophagus. This anomaly arises from the failure of regression of the right dorsal aorta during embryonic development.

**Why the Correct Answer is Right**
The double aortic arch can cause respiratory and gastrointestinal symptoms due to compression of the trachea and esophagus. The vascular ring can also lead to tracheal and esophageal obstruction, particularly during feeding or crying. This compression can result in symptoms such as stridor, wheezing, and dysphagia.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because the double aortic arch is a congenital anomaly, not a complication of a viral infection.

**Option B:** This option is incorrect because the double aortic arch is a vascular anomaly, not a condition related to the lymphatic system.

**Option C:** This option is incorrect because the double aortic arch is a congenital anomaly, not a condition related to the heart's electrical conduction system.

**Clinical Pearl / High-Yield Fact**
A key feature of the double aortic arch is the presence of a complete vascular ring that encircles the trachea and esophagus, which can lead to respiratory and gastrointestinal symptoms.

**Correct Answer:** C. Tracheal and esophageal obstruction