The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Diagnosis of CI. Difficile infection is made by which of the following methods?   (A) Toxin gene detection by polymerase chain reaction (PCR)   (B) Culture   (C) Enzyme - linked immunosorbent assay (ELISA)   (D) Nagler's reaction
['(A) Toxin gene detection by polymerase chain reaction (PCR) <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', "(A) Toxin gene detection by polymerase chain reaction (PCR) \n (B) Culture \n (C) Enzyme - linked immunosorbent assay (ELISA) \n (D) Nagler's reaction <> possible answers", '  Diagnosis of CI. Difficile infection is made by which of the following methods? <> context@']