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【单选题】
从一批产品 ( 其中正品、次品都多于两件 ) 中两件,观察正品件数和次品件数,下列事件是互斥事件的是 1 恰有一件次品和恰有两件次品; 2 至少有一件次品和次品; 3 至少有一件正品和至少有一件次品; 4 至少有一件次品和正品. ( )A.
①②
B.
①④
C.
③④
D.
①③
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