This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Route of administration of vancomycin in pseudomembranous colitis is - \nSelect and explain. \nA. i.m., B. Oral, C. i.v., D. s.c.', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Oral", 'role': 'assistant'}]