This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Carcinoma cervix extends to the lateral pelvic wall in which stage \nSelect and explain. \nA. Stage I, B. Stage II, C. Stage III, D. Stage IV', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Stage III B more precisely. Ref mudaliar textbook of obstetrics 6e p561', 'role': 'assistant'}]