2.Please give the correct name for the following structure. 5ee3234c0b728.jpg
(A)(R,S)-2,3-dichlorobutane
(B)(2R,3S)-2,3-dichlorobutane
(C)(2S,3S)-2,3-dichlorobutane
(D)(2R,3R)-2,3-dichlorobutane
(E)1,2-dichloroethane

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統計： A(0), B(0), C(3), D(0), E(0) #2348033