A 19-year-old man presented with acute abdominal pain, fatigue, vomiting and fever of up to 38.8°C. The physical exam revealed dehydration, tachycardia, postural hypotension, and diffuse mucocutaneous darkening.
What is the most likely diagnosis?
A) Lead poisoning
B) Acute intermittent porphyria
C) Adrenal insufficiency
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