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
Earliest symptom of Volkmann's Ischaemic is 
Select and explain. 
A. Pain in flexor muscles, B. Absence of pulse, C. Pain on passive extension, D. Cyanosis of limb
C: Pain on passive extension
Answer: C: Pain on passive extension 
Explanation: C i.e. Pain of passive extension