3.There are 4 different hydrogens in the compound described below. Which one is the most acidic hydrogen? 
(A)Ha
(B) Hb
(C)Hc
(D) Hd
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統計: A(5), B(32), C(13), D(149), E(0) #922986
統計: A(5), B(32), C(13), D(149), E(0) #922986