57. How many Kekule structures are possible for benzene, naphthalene, and anthracene ?
 
(A)I: 3, II: 4, III: 4
(B) I: 2, II:3, III: 4
(C) I: 2, II: 4, III: 4
(D)I: 3, II: 3, III: 4

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統計: A(0), B(1), C(0), D(0), E(0) #3328531

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