Lottery game: telling stories, singing and dancing, 4 pieces, 7 pieces, 1 piece is the least likely to draw _ _ _ _ _ _; It is most likely to draw _ _ _ _ _.

Possibility of dancing:1÷12 =112,

Possibility of singing: 712 = 712,

The possibility of telling stories: 4÷ 12=4 12,

Because: 712 > 412 >112;

So the possibility of dancing is the least, and the possibility of singing is the greatest;

So choose: c, b.