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: Surgery
[{'content': "Earliest symptom of Volkmann's Ischaemic is \nSelect and explain. \nA. Pain in flexor muscles, B. Absence of pulse, C. Pain on passive extension, D. Cyanosis of limb", 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Pain of passive extension', 'role': 'assistant'}]