Step 1: Understanding the Concept:
Vomiting is a protective reflex.
It is common in some animals and rare in others.
Step 2: Key Formula or Approach:
No specific formula.
Need to know vomiting in animals.
Step 3: Detailed Explanation:
Vomiting is rare in horses.
They have a strong cardiac sphincter.
Dogs and cats can vomit easily.
Pigs can vomit.
Ruminants rarely vomit but it is not as rare as in horses.
Thus, horses rarely vomit.
Step 4: Final Answer:
Vomiting is rare in horses.
Hence, the correct option is (A).