Final answer:
Complementary goods are products that are typically consumed together or are used to enhance each other's usage. One example of NOT a good example of complementary goods is Mobile phones and sim cards.
Step-by-step explanation:
Complementary goods are products that are typically consumed together or are used to enhance each other's usage. They have a negative cross elasticity of demand, meaning that the demand for one good decreases when the price of the other good increases. In this case, the pair that is NOT a good example of complementary goods is A. Mobile phones and sim cards. While these two products are often used together, they are not dependent on each other for consumption.