Question

Choose the incorrect pair of stain and its type.

• A. Animal - Oil
• B. Plant - Curry
• C. Mineral - Rust
• D. Dye - Paint

Hint:

For pattern-based classification questions like this, check whether each named example truly belongs to its labelled category by definition, not just by common association. Compare all four pairs the same way, and see which one breaks the pattern that the other three follow.

Answer 1

The Correct Option is D

To answer the question, we need to identify the incorrect pairing of a type of stain with its category. Let's examine each pair:

1. Animal - Oil: Animal stains often refer to those caused by products or substances derived from animals, such as fats or oils. Common examples include butter or grease from meat, which are oily substances. Hence, this is a correct pair.
2. Plant - Curry: Curry stains are typically associated with plant-based ingredients and spices, such as turmeric, which is a plant-based ingredient. This makes it a correct pair as well.
3. Mineral - Rust: Rust is formed from the oxidation of iron, a mineral, found in various household and industrial settings. Therefore, calling rust a mineral stain is appropriate, making this pair correct.
4. Dye - Paint: Paint is generally a compound material and does not solely consist of dyes. While paints contain pigments, binders, and solvents, they do not strictly classify as dyes. Paint is not a dye by type; hence, this pair is incorrect.

After evaluating all the options, the incorrect pair is Dye - Paint, as paint is not simply categorized as a dye. It is a mixture containing various components beyond just dye.

Answer 2

Another way to check this classification is to look at what each named substance is actually made of, and see whether that composition matches the category it has been paired with.

1. Animal - Oil: Oils such as ghee or butter are fats extracted directly from animal products, with nothing added, so calling this an animal-type stain is accurate to its composition.
2. Plant - Curry: Curry stains are dominated by curcumin, the pigment in turmeric, which is a plant extract used directly as a spice, so the plant classification matches its origin.
3. Mineral - Rust: Rust is a chemical compound, iron oxide, that forms naturally when iron corrodes. Since it comes from a mineral element and not from any living organism, the mineral label fits.
4. Dye - Paint: Paint is not a single dissolved colourant; it is a manufactured blend of pigment particles suspended in a binder and solvent, designed to coat a surface. A true dye stain, by contrast, is a soluble colourant that soaks into the fibre itself. Because paint's composition and behaviour on fabric differ fundamentally from a dye, grouping it under "dye" misclassifies it.

Checking the composition of each substance against its assigned category shows that only the paint example does not genuinely belong to the category it has been placed in.

Therefore, the correct answer is Dye - Paint.