50. In the experiment, which of the following would have been removed by washing the solution with sodium carbonate?
(A) Phthalic acid
(B) Methylbenzoate
(C) Aniline
(D) Nitrobenzene
(E) N-Phenylphthalimide

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統計： A(2), B(1), C(1), D(0), E(0) #2347826