**Question:** Pea-soup stool is characteristically seen in -

A. Hepatitis
B. Pneumonia
C. Cholestasis
D. Celiac disease

**Core Concept:**
Pea-soup stool refers to the appearance of the stool, which is typically light to dark brown and opaque, resembling the color and consistency of pea soup. This description is associated with specific medical conditions affecting the liver, bile ducts, or digestive system.

**Why the Correct Answer is Right:**
The correct answer is C. Cholestasis, as it is a condition characterized by the obstruction or reduced flow of bile, leading to increased bile pigments in the stool. This results in the characteristic pea-soup appearance. Cholestasis may be caused by various factors, including liver diseases (e.g., hepatitis), medication side effects, or gallstones.

**Why Each Wrong Option is Incorrect:**
A. Hepatitis (Option A) typically presents with jaundice, abdominal pain, and elevated liver enzymes, not pea-soup stool. Hepatitis primarily affects the liver and leads to jaundice, not the appearance of stool.
B. Pneumonia (Option B) is an infection affecting the lungs and does not cause the pea-soup stool appearance. Pneumonia primarily presents with respiratory symptoms and may lead to diarrhea or constipation, but not the described stool color.
D. Celiac disease (Option D) is an autoimmune disorder affecting the small intestine, leading to malabsorption symptoms and increased mucus in stool, not the pea-soup appearance. Celiac disease primarily presents with gastrointestinal symptoms, such as diarrhea, abdominal pain, and weight loss.

**Clinical Pearl:**
In clinical practice, observing the stool color and consistency can provide valuable information about the patient's underlying health condition. Pea-soup stool is a valuable clue for diagnosing cholestatic liver diseases like cholestasis and can contribute to guiding further diagnostic workup and management.