## **Core Concept**
The "triple bubble sign" is a radiological finding typically associated with a specific condition affecting the small intestine. It refers to the appearance of three air-filled structures seen on an abdominal X-ray or imaging study. This sign is often related to an obstruction or blockage in the gastrointestinal tract.

## **Why the Correct Answer is Right**
The correct answer, **C. jejunal atresia**, is associated with the "triple bubble sign" because this condition involves a congenital obstruction of the jejunum, a part of the small intestine. The obstruction leads to the accumulation of air and fluid in the stomach, duodenum, and a portion of the jejunum, creating the characteristic appearance of three air-filled structures or "bubbles" on imaging. This presentation is due to the blockage preventing air from passing further into the intestine.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is incorrect because while it might represent a condition that could potentially cause intestinal obstruction, it is not specifically associated with the "triple bubble sign."
- **Option B:** Similarly, this option does not directly correlate with the classic "triple bubble sign" seen in jejunal atresia.
- **Option D:** This option is also incorrect as it does not represent the condition classically associated with the "triple bubble sign."

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that jejunal atresia often presents with the "triple bubble sign" on abdominal X-ray, which is a critical diagnostic clue. This condition requires prompt surgical intervention. Remember, the presence of this sign suggests an obstruction at the level of the jejunum.

## **Correct Answer:** C. jejunal atresia