1. Which of the following nucleophile shows the greatest nucleophilicity in a protic solvent? (3%)
(A) \( \text{CH}_3\text{CO}_2^- \)
(B) \( \text{CH}_3\text{O}^- \)
(C) \( \text{CH}_3\text{S}^- \)
(D) \( \text{CH}_3\text{OH} \)
(E) \( \text{C}_6\text{H}_5\text{NH}_2 \)

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