To identify the outcomes for the event of rolling an even number less than 5 on a 10-sided number cube, we first determine what the even numbers from 1 to 10 are. The even numbers in this range are {2, 4, 6, 8, 10}.
Now, we need to find which of these even numbers are less than 5. The even numbers less than 5 are {2, 4}.
Thus, the correct outcome for the event of rolling an even number less than 5 is {2, 4}.
However, none of the provided options match this outcome. Please check if there are any other options or if there was an error in generating these choices.