The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A 32-year-old man comes to the physician for a pre-employment examination. He recently traveled to Guatemala. He feels well but has not seen a physician in several years, and his immunization records are unavailable. Physical examination shows no abnormalities. Serum studies show: Anti-HAV IgM Positive Anti-HAV IgG Negative HBsAg Negative Anti-HBs Positive HBcAg Negative Anti-HBc Negative HBeAg Negative Anti-HBe Negative Anti-HCV Negative Which of the following best explains this patient's laboratory findings?"   (A) Active hepatitis A infection   (B) Previous hepatitis A infection   (C) Chronic hepatitis B infection   (D) Chronic hepatitis C infection
['(A) Active hepatitis A infection <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Active hepatitis A infection \n (B) Previous hepatitis A infection \n (C) Chronic hepatitis B infection \n (D) Chronic hepatitis C infection <> possible answers', '  A 32-year-old man comes to the physician for a pre-employment examination. He recently traveled to Guatemala. He feels well but has not seen a physician in several years, and his immunization records are unavailable. Physical examination shows no abnormalities. Serum studies show:\nAnti-HAV IgM Positive\nAnti-HAV IgG Negative\nHBsAg Negative\nAnti-HBs Positive\nHBcAg Negative\nAnti-HBc Negative\nHBeAg Negative\nAnti-HBe Negative\nAnti-HCV Negative\nWhich of the following best explains this patient\'s laboratory findings?" <> context@']