Severe or progressive glomerular disease eventually leads to oliguria. Which of the following is a correct "definition" of oliguria?

A. Nausea: Nausea can occur with peptic ulcers, particularly if gastric emptying is delayed or if inflammation affects the stomach lining. However, it is not the most common or defining symptom.

B. Pain in the epigastric region: Epigastric pain is the hallmark symptom of peptic ulcers. It is typically described as burning or gnawing and may occur between meals or at night, often relieved by eating or antacids.

C. Melena: Melena, or black tarry stools, can occur if the ulcer bleeds, but this is more of a complication than a routine symptom. It indicates gastrointestinal bleeding and requires urgent evaluation.

D. Decreased appetite: Appetite changes may occur, especially if eating exacerbates pain in gastric ulcers. However, decreased appetite is not as frequent or specific a symptom as epigastric pain.

A. Bruton's disorder: Also known as X-linked agammaglobulinemia, this is a primary immunodeficiency that results in absent or reduced B cells and recurrent bacterial infections. It does not involve distinct facial features or limb defects as described in the question.

B. SCID: Severe Combined Immunodeficiency involves profound defects in both B and T lymphocyte function, leading to severe infections early in life. It is not associated with the described craniofacial abnormalities or limb deformities.

C. Potter syndrome: This condition is caused by severe oligohydramnios, often due to bilateral renal agenesis, and leads to characteristic physical features including widely spaced eyes with epicanthic folds, low-set ears, a broad or beaked nose, a receding chin, and limb deformities.

D. Down Syndrome: While individuals with Down Syndrome often have characteristic facial features such as upslanting palpebral fissures, flat nasal bridges, and low-set ears, they typically do not have beak-like noses, receding chins, or limb defects in the way described.