Rank the Following Deactivating Groups in Order of Increasing Deactivating

Rank the following deactivating groups in order of increasing deactivating strength, listing the least deactivating first. $$\begin{array} { c c c c } - \mathrm { COOH } & - \mathrm { CHO } & - \mathrm { SO } _ { 3 } \mathrm { H } & - \mathrm { NO } _ { 2 } \\\text { I } & \text { II } & \text { III } & \text { IV }\end{array}$$

A) I < II < III < IV
B) II < III < IV < I
C) II < I < III < IV
D) IV < III < I < II

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