Chocolate cyanosis seen in: (A) Wilson's disease, (B) Zinc poisoning, (C) Methemoglobinemia, (D) Mercurialentis
Answer is C. Methemoglobinemia Signs and symptoms Headache, nausea, vomiting, breathlessness, confusion, coma, convulsion, severe metabolic acidosis. Hemolysis may occur in G6PD deficiency. Blood is chocolate brown in color (chocolate cyanosis) Ref: FORENSIC MEDICINE AND Toxicology Dr PC IGNATIUS THIRD EDITION PAGE 430