The increasing order of the rate of \( \mathrm{HCN} \) addition to compounds \( \mathrm{A}-\math...

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The increasing order of the rate of \( \mathrm{HCN} \) addition to compounds \( \mathrm{A}-\mathrm{D} \) is
(A) \( \mathrm{HCHO} \)
(B) \( \mathrm{CH}_{3} \mathrm{COCH}_{3} \)
\( P \)
(C) \( \mathrm{PhCOCH}_{3} \)
(D) \( \mathrm{PhCOPh} \)
(1) \( \mathrm{D}\mathrm{B}\mathrm{C}\mathrm{A} \)
(2) D \( \) C \( \) B \( \) A
W.
(3) C \( \) D \( \) B \( \) A
(4) A \( \) B \( \) C \( \) D
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