This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Vibrio, Subject name: Microbiology
Rice watery stool is indicative of which organism- 
Select and explain. 
A. Vibrio cholerae Ol, B. Vibrio cholerae 0139, C. Vibrio vulnificus, D. Shigella
A: Vibrio cholerae Ol
Answer: A: Vibrio cholerae Ol 
Explanation: Ans. (a) Vibrio cholerae OlRef: Microbiology by Ananthanarayan and Paniker 8th ed. /302-305* Though the various strains of cholera may present with rice watery diarrhea, the classic rice watery diarrhea is usually associated with strains Ol and strain 0139.* In these strains the more common strain to find is strain Ol.