This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Maximal level of cardiac output is seen at: \nSelect and explain. \nA. 22-26 weeks of pregnancy, B. 26-30 weeks of pregnancy, C. 30-34 weeks of pregnancy, D. 34-38 weeks of pregnancy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CARDIAC OUTPUT - Max. at Immediate Post-paum > second stage of Labour > 32 weeks POG', 'role': 'assistant'}]