• FDA Extra-Label Drug Use Prohibitions: Under the Animal Medicinal Drug Use Clarification Act (AMDUCA) regulations (21 CFR 530.41), the US FDA strictly prohibits any extra-label use of fluoroquinolone-class antimicrobials in food-producing animal species.
• Rationale: Imposed to prevent the selection and dissemination of fluoroquinolone-resistant enteric pathogens (e.g., Campylobacter, Salmonella) into human food supply chains.

Correct option: (2) Fluoroquinolone-class antibiotics