Horse : Pony : mare

  • A. Sheep : Lamb : Goat
  • B. Lion : Cub : Den
  • C. Man : Child : Woman
  • D. Cat : Kitten : Puppy

Explanation

A pony and a mare are distinct terms related to a horse, one referring mainly to size or type and the other to sex. A child and a woman are likewise terms describing a human by age and sex, so c is the closest option.

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