What are the three types of contaminants?

• A. Biological, Chemical, Physical.
• B. Chemical, Physical, Nutritional.
• C. Microbial, Chemical, Biological.
• D. Biological, Radiological, Physical.

Answer: (D)

Contaminants are grouped into three broad types in many safety programs: biological, radiological, and physical. Biological contaminants are living organisms or their byproducts, such as bacteria, viruses, parasites, and the toxins they produce. Radiological contaminants involve radioactive materials or sources that should not be present. Physical contaminants are tangible foreign objects like glass, metal fragments, or plastic pieces.

This division helps tailor controls: sanitation and proper handling address biological risks; radiological controls involve shielding, monitoring, and strict source control; physical contamination is tackled with screening methods like metal detectors and thorough visual checks.

Other options mix in chemical contaminants or use terms that overlap with biological (microbial is essentially biological) or introduce categories not used in this framing (nutritional). So, the three-category model of biological, radiological, and physical best fits this context.