**Core Concept**
Ileal atresia is a congenital anomaly characterized by a complete or partial obstruction of the ileum due to a failure of recanalization during embryonic development. This obstruction can lead to a variety of radiological findings, depending on the location and severity of the atresia.

**Why the Correct Answer is Right**
The correct answer is likely to involve a characteristic radiological finding associated with ileal atresia, such as a "double bubble" sign or a "string of pearls" sign, which are indicative of intestinal obstruction. These signs are caused by the accumulation of gas and fluid proximal to the atresia, leading to a characteristic appearance on abdominal radiographs.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe a radiological finding associated with ileal atresia. While intestinal obstruction can cause a variety of radiological abnormalities, this option is too vague and does not provide any specific information about the condition.

**Option B:** This option is incorrect because it is not a characteristic radiological finding associated with ileal atresia. While intestinal perforation can cause a variety of radiological abnormalities, including free air under the diaphragm, this option is not directly related to ileal atresia.

**Option C:** This option is incorrect because it is not a specific radiological finding associated with ileal atresia. While intestinal obstruction can cause a variety of radiological abnormalities, this option is too general and does not provide any specific information about the condition.

**Clinical Pearl / High-Yield Fact**
A key radiological finding in ileal atresia is the "string of pearls" sign, which is caused by the accumulation of gas and fluid proximal to the atresia, leading to a characteristic appearance on abdominal radiographs.

**Correct Answer:** D