**Core Concept**
Paradoxical aciduria refers to the condition where urine is acidic despite the body's overall acid-base balance being alkalotic. This phenomenon occurs due to the kidneys' ability to reabsorb and secrete hydrogen ions in response to changes in blood pH.

**Why the Correct Answer is Right**
In the case of paradoxical aciduria, the kidneys continue to reabsorb sodium and water in exchange for hydrogen ions, even when the blood pH is alkalotic. This results in the excretion of acidic urine. The mechanism involves the sodium-hydrogen exchanger in the proximal convoluted tubule, which helps to maintain acid-base homeostasis in the body.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe the pathophysiology of paradoxical aciduria.
**Option B:** This option is incorrect as it is a condition characterized by the loss of bicarbonate in the urine, not aciduria.
**Option C:** This option is incorrect as it is a condition characterized by the presence of glucose in the urine, not aciduria.

**Clinical Pearl / High-Yield Fact**
Paradoxical aciduria is often seen in patients with severe metabolic alkalosis, particularly those with a history of vomiting or nasogastric suction. It is essential to consider this condition when evaluating patients with aciduria and a history of gastrointestinal disturbances.

**Correct Answer:** D.