Correct option is C
The error in the sentence "Each new word in this book have a different meaning" lies in part C with the verb agreement.
• "Each" is a singular subject pronoun that requires a singular verb. Thus, "have" should be corrected to "has" to comply with subject-verb agreement rules.
• The correct sentence should read, "Each new word in this book has a different meaning," ensuring that the verb "has" aligns with the singular subject "Each new word."
• Subject-verb agreement is a fundamental rule in English grammar where the verb must agree in number with its subject, singular with singular and plural with plural.