What is a characteristic physical finding in patients exposed to arsenic?

The characteristic physical finding in patients exposed to arsenic is often described as garlic breath. This phenomenon occurs due to the metabolic breakdown of arsenic in the body, leading to the production of volatile sulfur compounds, including dimethylarsinic acid, which has a garlic-like odor. This distinct smell can help clinicians suspect arsenic poisoning when they encounter it in patients, along with other clinical signs and symptoms such as gastrointestinal distress or neurological manifestations.

The other choices do not correlate with arsenic exposure. Citrus aroma, sweet odor, and pungent smell are not recognized as typical byproducts or symptoms associated with arsenic toxicity. Knowing the characteristic symptoms and signs of various poisonings, including the smell associated with them, is essential for accurate diagnosis and timely management.