Step 1: Context from the story.
This question is from the chapter A Triumph of Surgery by James Herriot. The story narrates how a veterinary doctor helped Tricki, an overfed pet dog, regain his health.
Step 2: Analyzing Tricki’s identity.
Tricki was a pampered dog, overfed by his mistress Mrs. Pumphrey. Due to his overeating, he became ill and needed medical attention.
Step 3: Analyze the options.
(A) A cat: Incorrect — Tricki was not a cat.
(B) A monkey: Incorrect.
(C) A dog: Correct — Tricki was a small dog.
(D) A rabbit: Incorrect.
Step 4: Conclusion.
Thus, the correct answer is (C) A dog.