This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Medicine
[{'content': 'A 60-year-old industrial worker presents with shortness of breath for the past week. Blood withdrawn shows thick brownish red Color. Diagnosis? \nSelect and explain. \nA. Sickle cell anemia, B. Hemolytic anemia, C. Meth-hemoglobinemia, D. G-6-P-deficiency', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C. Meth-hemoglobinemia* Sickle cell anemia has a pediatric presentation.* Hemolytic anemia will cause pallor and not brown discoloration of blood.* In G6PD in event of intravascular hemolysis the hemoglobinuria will cause a black urine. Therefore, by exclusion the answer is meth-hemoglobinuria.', 'role': 'assistant'}]