Identify the ODD term in each set and name the CATEGORY to which the remaining three belong:
Syringes, Soiled dressings, Discarded needles, Household detergents
Topic: Biomedical waste
Answer
Odd one out: HOUSEHOLD DETERGENTS. Category of the others: BIOMEDICAL (hospital) WASTES.
Syringes, soiled dressings and discarded needles are all BIOMEDICAL WASTE — generated in hospitals and laboratories during the treatment of patients, infectious, and requiring incineration or autoclaving rather than ordinary disposal.
HOUSEHOLD DETERGENTS are domestic cleaning agents. They are certainly pollutants — they reach rivers and cause foaming and eutrophication — but they come from homes, not hospitals.
THE CARE NEEDED: all four are pollutants, so "pollutants" is not a category that separates three from one. The category must be the narrower one. Whenever every term shares an obvious label, look for a finer one.