The increasing order of nucleophilicity of the following nucleophiles is : (a) CH3CO2$-$ (b) H2O (c) CH3SO3$-$ (d) $\mathop O\limits^ - H$

Question

The increasing order of nucleophilicity of the following nucleophiles is :
(a) CH₃CO₂^$-$ (b) H₂O
(c) CH₃SO₃^$-$ (d) $\mathop O\limits^ - H$

(b) < (c) < (a) < (d)

(b) < (c) < (d) < (a)

(a) < (d) < (c) < (b)

(d) < (a) < (c) < (b)

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