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: Forensic Medicine
[{'content': "Bluish discolouration of the vagina seen in pregnancy is known as: KCET 12 \nSelect and explain. \nA. Chadwick's sign, B. Goodell's sign, C. Hegar's sign, D. Palmer's sign", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. Chadwick's sign", 'role': 'assistant'}]