5. What is the major organic product of the following reaction? (3%)
O
CH3 1. LDA/THF
2. CH3I
?
O
CH3
CH3
O
CH3
CH3
CH3
H3C OH O
H3C CH3
O
CH3
H3C I II III IV V
(A) I
(B) II
(C) III
(D) IV
(E) V

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