Correct option is D
Levers are classified based on the relative positions of the
fulcrum,
effort, and
load:
Class 1 Lever: Fulcrum is between the load and the effort (e.g., seesaw, scissors).
Class 2 Lever: Load is between the fulcrum and the effort (e.g., wheelbarrow, nutcracker).
Class 3 Lever: Effort is between the fulcrum and the load (e.g., tweezers, stapler, hockey stick).
In the given options wheel barrow falls in category of second class lever while rest given falls in the third category of lever type.
