Correct Answer & Explanation
Option C
• The words 'contaminate', 'pollute', and 'desecrate' are all synonyms of 'defile', meaning to make something dirty, impure, or unholy.
• 'Purify' means to make something clean or pure.
• Therefore, 'purify' is the antonym or the odd one out, as it represents the opposite action of the other words.