The question asks us to identify the pair of words from the given options that arenot synonyms. Synonyms are words that have similar meanings, while antonyms are words that have opposite meanings. We need to examine each pair to determine their relationship.

Analyzing Word Pairs for Synonymy

• Option 1: Aversion, dislike

  The word 'aversion' means a strong dislike or disinclination. The word 'dislike' means a feeling of distaste or hostility. These two words share a very similar meaning, making them synonyms.

• Option 2: Luminous, radiant

  The word 'luminous' means giving off light; bright or shining. The word 'radiant' means sending out light; shining or glowing brightly. These words are synonyms as they both describe something bright or shining.

• Option 3: Plunder, loot

  The word 'plunder' means to steal goods from (a place or person), typically using force. The word 'loot' means goods stolen during war or civil disorder. These terms are synonyms, often used interchangeably to describe stolen goods or the act of stealing.

• Option 4: Yielding, resistant

  The word 'yielding' means to give way to argument or pressure; to be flexible or compliant. The word 'resistant' means to oppose or withstand force, pressure, or treatment; not giving way. These words have opposite meanings, making themantonyms, not synonyms.

Identifying the Non-Synonym Pair

Based on the analysis of each option, the pair 'Yielding, resistant' consists of words with opposite meanings.

Therefore, the correct option is the one containing words that are not synonyms.