This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Pain in early labor is limited to which dermatomes? \nSelect and explain. \nA. T10 -L1, B. S1-S3, C. L4-L5, D. L2-L3', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In the early stages of labour pains are mainly uterine in origin because of painful uterine contractions It is distributed along the cutaneous nerve distribution of T10 - L 1. In the later stages pain is due to cervical dilatation This pain is referred to back through sacral plexus. Ref: Dutta Obs 9e pg 112.', 'role': 'assistant'}]