Choose the pair in which the words are differently related from the rest.

The answer is C. Garbage : Dustbin.

In the other three pairs, the first word is a substance that is used in or with the second word. Petrol is used to power cars, ink is used to write with pens, and lead is used to make pencils. Garbage, on the other hand, is not used in or with dustbins. Dustbins are containers that are used to store garbage.

Here is a more detailed explanation of each pair:

• Petrol is a fuel that is used to power cars. It is a liquid that is made from petroleum, which is a fossil fuel. Petrol is burned in the engine of a car to create power.
• Ink is a liquid that is used to write with pens. It is made from a variety of materials, including dyes, solvents, and resins. Ink is applied to paper with a pen to create writing.
• Lead is a metal that is used to make pencils. It is a soft metal that is easily sharpened. Lead is used in the core of a pencil to create the writing point.
• Garbage is waste material that is produced by people and animals. It can include food scraps, paper, plastic, and other materials. Garbage is usually disposed of in landfills or incinerators.

I hope this explanation is helpful!