Classification – Odd one out (tool/action relationships vs waste-to-container): Which pair is unlike the others: Petrol : Car, Ink : Pen, Garbage :Dustbin, Lead : Pencil?

Introduction / Context:
Relationship-pair classification often identifies “input-to-tool” or “material-to-instrument” structures. Three of these pairs link an operational input or material to the object that uses or contains it during its intended function, whereas one links waste to a receptacle—semantically different from operational use.

Given Data / Assumptions:

• Petrol : Car → fuel used by a car (operational input).
• Ink : Pen → fluid used by a pen (material input).
• Lead : Pencil → material core of a pencil (component/input).
• Garbage :Dustbin → waste placed into a receptacle after use (disposal, not operational input).

Concept / Approach:
Separate “inputs/components for operation” from “waste disposal relationship.” The latter is the odd one out.

Step-by-Step Solution:
Car requires petrol to run.Pen requires ink to write.Pencil uses lead/graphite as its writing core.Garbage is not an input to the dustbin’s operation; it is refuse placed for disposal.

Verification / Alternative check:
Component-vs-container framing still groups the first three as material-to-tool (fuel, ink, core) but leaves garbage:dustbin as waste-management rather than functional operation.

Why Other Options Are Wrong:

• Petrol:Car, Ink:Pen, Lead:Pencil each maps a required operating material/component to its device.

Common Pitfalls:
Overlooking that a dustbin does not “use” garbage to perform any constructive function; it merely receives it.

Final Answer:
Garbage :Dustbin