13. Choose the set of reagents which best accomplishes the desired conversion.
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(A) sulfuric acid, H2O
(B) 1. hydrogen peroxide, H2O; 2. KOH
(C) 1. sodium borohydride; 2. KOH
(D) 1. hydroxylamine; 2. H2O
(E) 1. hydrazine; 2. KOH, H2O

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統計： A(0), B(0), C(0), D(1), E(2) #2241186