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': 'First symptom of pregnancy is: Kerala 07 \nSelect and explain. \nA. Tingling in the breasts, B. Amenorrhea, C. Morning sickness, D. Quickening', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Amenorrhea', 'role': 'assistant'}]