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: Physiology
[{'content': 'The normal value of P50 on the oxyhaemoglobin dissociation curve in an adult is \nSelect and explain. \nA. 1.8 kPa, B. 2.7 kPa, C. 3.6 kPa, D. 4.5 kPa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Adult Hb- 50% saturation at PO2 of 26mmHg.\n1mmHg= 0.133 KPa\n26mmHg= 0.133 X 26 = 3.45', 'role': 'assistant'}]