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: Microbiology
[{'content': 'The most common site, where organisms are present in a typhoid carrier is: \nSelect and explain. \nA. Spleen, B. Gall Bladder, C. Liver, D. Salivary gland', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]