75. Which of the following substituents would have the lowest Cahn-Ingold-Prelog priority?
(A) -CH2OH
(B) -CH2COOH
(C) -CH2CH2Cl
(D) -CH2NH2
(E) -CH2CH2Br

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統計： A(0), B(4), C(7), D(3), E(0) #1074621