This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Integrated QBank, Subject name: Unknown
A 50-year-old male presented to ohopedic OPD for regular follow up. He was being treated for an injury as marked (dissected specimen) in forearm in A. During examination, Doctor is eliciting the above sign. Patient felt tingling sensation on tapping distal to site of injury. What is the rate of growth of injured structure's stump? 
Select and explain. 
A. 10-15 mm/day, B. 1-3 mm/day, C. 25-30 mm/day, D. None of the above
B: 1-3 mm/day
Answer: B: 1-3 mm/day 
Explanation: Tingling sensation on tapping nerve stump is known as Tinel sign. Presence of Tinel sign distal to site of injury indicates nerve stump is regenerating. Nerve stump grows at rate of 1-3 mm/day.