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: Gynaecology & Obstetrics
[{'content': 'Fetal scalp blood pH of less than ......................... is abnormal : \nSelect and explain. \nA. 7.4, B. 7.3, C. 7.2, D. 7.35', 'role': 'user'}, {'content': 'Answer: C \nExplanation: 7.2', 'role': 'assistant'}]