The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Vaccine for caries is based on which immunoglobulin   (A) IgG   (B) IgA   (C) IgE   (D) IgM
['(B) IgA <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) IgG \n (B) IgA \n (C) IgE \n (D) IgM <> possible answers', '  Vaccine for caries is based on which immunoglobulin <> context@']