Step 1: Define the terms in List-I.\[\begin{array}{rl} \bullet & \text{(A) Re-backing: A book conservation technique replacing the spine cover while keeping the original boards, essentially attaching a new shelf back.} \\ \bullet & \text{(B) Reinforcing: Strengthening an existing book structure, such as by adding guards to the hinges.} \\ \bullet & \text{(C) Mending: Minor repairs, like fixing a tear in a page. A form of restoration not involving major part replacement.} \\ \bullet & \text{(D) Repairing: A general term for fixing a worn or damaged book to return it to usable condition; a partial rehabilitation.} \\ \end{array}\]
Step 2: Match the definitions from Step 1 with the descriptions in List-II.\[\begin{array}{rl} \bullet & \text{(A) Re-backing matches (III) Attaching a new shelf back.} \\ \bullet & \text{(B) Reinforcing matches (IV) Strengthening the structure.} \\ \bullet & \text{(C) Mending matches (I) Major restoration not involving replacement (though mending is usually minor, this is the closest match).} \\ \bullet & \text{(D) Repairing matches (II) Partial rehabilitation of a worn volume.} \\ \end{array}\]
Step 3: Determine the correct combination.The correct matching: A-III, B-IV, C-I, D-II.