‘Triclosan’, considered harmful when exposed to high levels for a long time, is most likely present in which of the following? ​

The answer is D (Toiletries). Triclosan is a broad-spectrum antibacterial and antifungal agent added to toothpastes, soaps, deodorants, and similar personal-care products to reduce microbial load. That is why it turns up in toiletries, and why the question asks about long-term high exposure.

• A (Food preservatives): Preservatives are chosen for food-specific properties, and triclosan is not a food preservative. Food-contact preservatives are regulated separately.
• B (Fruit-ripening substances): Ripening is linked to ethylene or agents like calcium carbide, which is a separate and more recognised food-safety issue. Triclosan has no role here.
• C (Reused plastic containers): The concern with reused plastics is usually bisphenol A, phthalates, or leaching of plastic additives. Triclosan is not the standard answer.

Core concept: antimicrobial agents in consumer products and their health effects. Triclosan is studied as an endocrine disruptor and as a driver of antimicrobial resistance, which links directly to the GS-III theme of AMR and to chemical safety under environment and health. The US FDA withdrew triclosan from consumer antiseptic soaps in 2016, so the regulatory position has changed since the exam year.

Trap: Candidates pick food-related options because the question says harmful. Ask where a germ-killing chemical would be used on the body, not in food.