12. Chloroquine is used as an antimalarial drug. Rank the three nitrogen atoms in decreasing (strongest to weakest) order of basicity.

(A) III ＞ I ＞ II
(B) I ＞ III ＞ II
(C) II ＞ I ＞ III
(D) II ＞ III ＞ I
(E) III ＞ II ＞ I

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