**Core Concept**
The non-passage of meconium in a neonate is a clinical indicator of intestinal obstruction or other gastrointestinal issues. This condition can be caused by a variety of factors, including anatomical abnormalities, infections, or metabolic disorders.

**Why the Correct Answer is Right**
The next step in evaluation for a neonate with non-passage of meconium is to perform an abdominal X-ray to assess for intestinal obstruction or other gastrointestinal issues. An abdominal X-ray can help identify potential causes such as intestinal atresia, meconium ileus, or Hirschsprung's disease. The X-ray can also help to rule out other causes of non-passage of meconium.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not specified, please provide the options for accurate explanation.
* **Option B:** This option is not specified, please provide the options for accurate explanation.
* **Option C:** This option is not specified, please provide the options for accurate explanation.

**Clinical Pearl / High-Yield Fact**
In cases of non-passage of meconium, it is essential to consider the possibility of intestinal obstruction or other gastrointestinal issues. A prompt and accurate diagnosis is crucial to prevent complications and ensure timely treatment.

**Correct Answer:** D. Abdominal X-ray