7. Which of the following compounds is meso?
(A)61ba8b6b36857.jpg
(B)61ba8b72c0cfb.jpg
(C)61ba8c8b2ac7f.jpg
(D)61ba8c91e9544.jpg
(E)61ba8c9849335.jpg

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統計： A(0), B(0), C(0), D(3), E(0) #2823971