This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Gynaecology & Obstetrics
[{'content': 'Blood in urine in a patient in labour is diagnostic of: \nSelect and explain. \nA. impending scar rupture, B. Urethral injury, C. Obstructed labour, D. Cystitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Blood in urine in a patient in labour is indicative of scar rupture.Previous history of classical cesarean section makes woman vulnerable to unpredictable rupture of uterus. (DC DUTTA TB of obstetrics 8th edtn pg 383)', 'role': 'assistant'}]