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': 'Pseudomembranous colitis, all are true except - \nSelect and explain. \nA. Toxin A is responsible for clinical manifestation, B. Toxin B is responsible for clinical manifestation, C. Blood in stools is a common feature, D. Summit lesions is early histopathological finding', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Blood in stools is a common feature", 'role': 'assistant'}]