Answer: the second option.
A binomial experiment is an experiment with only two possible outcomes.
In the first option, there is four poissible outcomes (i.e. ace, king, queen, jack)
In the second option, there are two possible outcomes (i.e. '2 number cubes')
The third option has three possible outcomes (i.e. yes, no, maybe)
In the last option, there are six possible outcomes (i.e. A through F)