The combined meaning of the prefix and root in the word abduct is Lead away.
Prefix
A prefix is an affix which is placed before the stem of a word. Adding it at the beginning changes it to another word.
Abduct mean to seize or take away a person by force. For this context, Abduct means to lead away.
For this question, the prefix here is Lead and the root is Away.
Therefore, the correct answer is option B.
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