**Core Concept**
Sequestrated lung, also known as pulmonary sequestration, is a rare congenital anomaly where a portion of lung tissue is not connected to the airway system and receives its blood supply from an anomalous systemic artery rather than the pulmonary artery. This condition is usually diagnosed in infancy or childhood.

**Why the Correct Answer is Right**
The most common blood supply to a sequestrated lung is from the descending aorta, which is due to the presence of an anomalous systemic artery that arises from the aorta and supplies the sequestered lung tissue. This artery is usually located below the diaphragm and can be a branch of the aorta or one of its major branches, such as the splenic or left gastric artery. The sequestrated lung tissue is usually located in the lower lobes of the lung and can be found on the right or left side.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the bronchial arteries, which are the usual blood supply to the airway walls, are not the primary blood supply to a sequestrated lung.
* **Option B:** This option is incorrect because the pulmonary artery, which is the primary blood supply to the normal lung tissue, is not the blood supply to a sequestrated lung.
* **Option C:** This option is incorrect because the coronary arteries, which supply the heart muscle itself, are not the blood supply to a sequestrated lung.

**Clinical Pearl / High-Yield Fact**
Sequestrated lung is often diagnosed prenatally or in early childhood, and it can be associated with other congenital anomalies, such as congenital diaphragmatic hernia or cardiovascular anomalies.

**Correct Answer: D.**