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The increasing order of nucleophilicity of the following nucleophiles is : (a) CH 3 CO 2 (b) H 2 O (c) CH 3 SO 3 (d) OH

1. (b) < (c) < (a) < (d)
2. (b) < (c) < (d) < (a)
3. (a) < (d) < (c) < (b)
4. (d) < (a) < (c) < (b)

Correct answer: (b) < (c) < (a) < (d)

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