61. Which sequence ranks the following carbonyl compounds in order of increasing rate of nucleophilic addition? (A) 2 ＜ 3 ＜ 1 (B) 3 ＜ 2 ＜ 1 (C) 2 ＜ 1 ＜ 3 (D) 1 ＜ 3 ＜ 2