B, four cards painted with red (2 cards), blue (1 card) and yellow (1 card) are mixed evenly, and the probability that any card is red with eyes closed is 24 =12;
C, the weight of the front and back of the bottle cap is different, and the probability of the front facing up is not12;
D. The probability of buying Chengdu Business Daily by lottery is 1.4.
So choose B.