Which of the following is NOT a key responsibility of veterinarians?

• A. Ensuring ethical treatment and humane handling of animals.
• B. Preventing and controlling zoonotic diseases.
• C. Promoting sustainable livestock management.
• D. Marketing pet food brands.

Answer: (D)

The key idea here is understanding what veterinarians are responsible for in their professional role. Their duties center on animal welfare, preventing and managing diseases that can affect animals and people (zoonotic diseases), and promoting practices that support sustainable, ethical animal care in farming and companion-animal contexts. Marketing pet food brands, however, is not part of the core responsibilities of a veterinarian. Their role in nutrition is to provide evidence-based guidance and ensure safety and suitability of diets for individual animals, not to promote or market specific brands. So the option that is not a key responsibility is marketing pet food brands.