Concept:
Adulteration means cheating by mixing a cheaper material into a genuine drug. Different drugs have specific chemical tests to catch this.
Step 1:
Honey is often adulterated by adding commercial sugar syrups (like invert sugar made by heating sugar with acid). When sugars are heated or treated with acid, they break down and form a compound called hydroxymethylfurfural (HMF).
Step 2:
So pure, natural honey has very little HMF, but adulterated or overheated honey shows a high HMF level. Measuring HMF therefore directly flags honey adulteration.
Step 3:
The other options are checked by different tests and are not linked to HMF, so honey is the correct match.
Answer: Option (1) — Honey.