Which word correctly completes: 'The clinical trial demonstrated that the new vaccine is superior ___ conventional treatments'?

Answer and explanation

Correct answer: B. to

  1. Step 1: Latin comparative adjectives (superior, inferior, prior, posterior, senior, junior) are followed by 'to', not 'than'. Step 2. 'The clinical trial demonstrated that the new vaccine is superior to conventional treatments.' Answer: to. Why not the others: 'superior than' is a common grammatical error; 'superior over' is non-standard; 'superior against' is incorrect.

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