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: Gynaecology & Obstetrics
[{'content': 'Most common type of vaginal carcinoma is : \nSelect and explain. \nA. Squamous cell carcinoma, B. Adenocarcinoma, C. Transitional cell carcinoma, D. Columnar cell Ca', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Squamous cell carcinoma', 'role': 'assistant'}]