This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Normal Labour, Subject name: Gynaecology & Obstetrics
[{'content': 'Mrs. S (G2 L1) presented to the hospital in labor pains. On examination she had 3 uterine contractions of 20 seconds in 10 minutes, cervical dilation 6 cm and HR 145 bpm. What is the stage of labor? \nSelect and explain. \nA. Stage I, B. Stage II, C. Stage III, D. Stage IV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a, i.e. Stage IAs discussed in chapter 7 of the book, first stage of labor is from the time when a female starts perceiving true labor pains and uptil 10 cm of dilatation.', 'role': 'assistant'}]