**Question:** Arsenic poisoning causes

**Core Concept:** Arsenic is a toxic element that can be ingested or inhaled, leading to various degrees of toxicity. Arsenic poisoning can affect multiple organ systems, leading to clinical manifestations.

**Why the Correct Answer is Right:**

Arsenic poisoning, due to its toxic effects, can lead to acute or chronic poisoning, depending on the duration and the dose of exposure. Acute arsenic poisoning is characterized by a rapid onset of symptoms, while chronic arsenic poisoning occurs over a longer period of time. Both forms can cause multiple organ damage, including skin, gastrointestinal tract, cardiovascular, respiratory, and neurological systems.

Arsenic poisoning primarily targets the skin and causes symptoms like hyperpigmentation, hyperkeratosis, and dermatitis. It can also lead to gastrointestinal symptoms like abdominal pain, vomiting, diarrhea, and gastrointestinal ulcers. In cardiovascular system, arsenic poisoning can cause hypertension, arrhythmias, and myocardial damage. In the respiratory system, it can cause respiratory distress, pulmonary edema, and pneumonia. Neurological manifestations include peripheral neuropathy, encephalopathy, and peripheral vascular disease.

**Why Each Wrong Option is Incorrect:**

B. Arsenic poisoning can cause respiratory distress and pulmonary edema, but this is not the primary manifestation of acute arsenic poisoning.
C. While hyperpigmentation is a feature of chronic arsenic poisoning, it is not the primary manifestation of acute arsenic poisoning.
D. Arsenic poisoning can cause hypertension, but this is not the primary manifestation of acute arsenic poisoning.

**Clinical Pearl:**

Arsenic poisoning is a severe medical emergency that requires immediate management. It is essential to suspect arsenic poisoning in patients presenting with acute poisoning symptoms, especially in areas with known arsenic contamination in drinking water or occupational exposure. Prompt diagnosis and treatment may prevent severe complications and improve patient outcomes.

**Correct Answer:**

Correct Answer: D. Arsenic poisoning can cause hypertension, but this is not the primary manifestation of acute arsenic poisoning.

**Why the Correct Answer is Right:**

The primary manifestation of acute arsenic poisoning is acute gastrointestinal symptoms like vomiting, diarrhea, abdominal pain, and neurological symptoms like confusion, seizures, and coma. Hypertension is a secondary manifestation in some cases, particularly in chronic arsenic poisoning. When considering arsenic poisoning, a thorough evaluation of the patient's history, symptoms, and exposure context is crucial for accurate diagnosis and timely management.