趣味的数学-83【逻辑题】
某张多选题试卷中，某一题的题目没有印刷清楚【illegible】，但这题的6个选择的答案却印清楚了。它们分别是：
a】All of the below.
b】None of the below.
c】All of the above.
d】One of the above.
e】None of the above.
f】None of the above.
哪个是正确的答案？
【Crux Mathematicorum, 1979, problem 357】
Yes!
But how did get it?
e?
