You have not provided the options, therefore, I cannot provide an exact solution. However, I will try to help you with the concept.
Complementary events are defined as events in which only two outcomes are possible. There is no room for a third possibility.
Examples: 1- Flipping a coin: In this case, you either get a head or a tail. Only two outcomes are possible. These are complementary events
2- Rolling a dice to either get a 1 or a number that is not 1: In this case, you either get a 1 or you don't. Only two outcomes are possible. These are complementary events
