The question contains pairs of words that are related to each other in a certain way. Three of the following four word pairs are alike as these have the same relationship and thus form a group. Which word pair is the one that DOES NOT belong to that group? (The words must be considered as meaningful English words and must not be related to each other based on the number of letters / number of consonants/vowels in the word.)

Correct — A. Three of the pairs name a thing and one of the parts it is made of. One does not.

Rule: the second word is a component of the first.

Pages are part of a book.
Petals are part of a flower.
A lens is part of a pair of spectacles.

Feet are not part of shoes. Shoes are worn on feet, which describes what shoes are for, not what they are made of.

That leaves Shoes – feet standing outside the group — option (a).

Why the others are wrong

• (b)
  Book – pages — Pages are what a book is made of, which is the part-and-whole link the group is built on, so this pair belongs inside the group.
• (c)
  Flowers – petals — Petals are parts of a flower in exactly the same sense, so this pair sits with the other two rather than apart from them.
• (d)
  Spectacles – lens — A lens is a component of a pair of spectacles, so this pair shares the group's relation even though the paper prints its second word in the singular.

An odd-one-out on word pairs is settled by naming the relation in one sentence before you look at the options. Here the sentence is *the second word is a part of the first*, and once it is written down, three pairs match it and one does not.

The pair that fails is the one that swaps a part-and-whole link for a link of use. Shoes and feet belong together in life, which is what makes the pair feel right — but belonging together is not the same relation.

Association is the commonest decoy in these items, precisely because it is so easy to mistake for structure.

Key facts

• Pages are components of a book, petals are components of a flower and a lens is a component of a pair of spectacles.
• Shoes are worn on feet, which states what shoes are used for rather than what they are made of.
• The question's note rules out deciding the odd pair on letter, vowel or consonant counts.

Common traps

• Grouping on things that come in multiples, which puts pages, petals and feet together and hides the real link.
• Reading Shoes – feet as part-and-whole because the two belong to the same everyday scene.

No directly related past PYQ was found.