Dependent events are two events in which the outcome of one is dependent on the outcome of the other. Looking at the given option,
seeing a red car does not have any effect on catching a cold
Getting heads from a coin toss and drawing a queen from a standard deck of cards
are independent events
A tuba is played with the mouth so, it is impossible to get a hole in your sock. They are independent
Thus, the correct option is
A. Rolling a 6 on the first of two number cubes and getting a total of 12 on the two rolls. Getting a total of 12 is dependent on the outcomes of the two rolls