Tinels sign is used -

Ans. is 'd' i.e., To asses the regeneration Tinels sign:* Brisk percussion along the course of an injured nerve from distal to proximal direction may elicit a tingling sensation in the distal distribution of the nerve.* This is described as Tinels sign.* The point of hypersensitivity marks the site of abnormal nerve sprouting: if it progresses distally at successive visits this signifies regeneration; if it remains unchanged this suggests a local neuroma.