I. Choose one correct answer for the following questions
【單選題】每題 1 分,共計 60 分,答錯 1 題倒扣 0.25 分,倒扣至本大題零分為止,未作答,不給分亦不扣分。1. What is the major product obtained from the following reaction sequence? 
(A) I
(B) II
(C) III
(D) IV
(E) V

(A) I
(B) II
(C) III
(D) IV
(E) V
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統計: A(4), B(2), C(29), D(0), E(2) #943129
統計: A(4), B(2), C(29), D(0), E(2) #943129