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Question:

"My doctor prescribed an antibiotic to fight my infection."
Which of the following defines the prefix “anti-“ as used in the word antibiotic in the sentence above?

A against
Explaination


Against is the correct answer because the context clue “fight” indicates that “anti-” means “against”.
With is incorrect because it is an antonym (opposite) of anti-.
After is incorrect because it does not fit the sentence.
For is incorrect because it is an antonym of anti-.