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
Route of administration of vancomycin in pseudomembranous colitis is - 
Select and explain. 
A. i.m., B. Oral, C. i.v., D. s.c.
B: Oral
Answer: B: Oral 
Explanation: Ans. is 'b' i.e., Oral