The correct answers are: Spain and Portugal.
The Iberian Peninsula is one of the biggest peninsulas in Europe. It is located in the southwestern part of the continent. Most of the peninsula is dominated by the territory of Spain. The second biggest country, in its western part, is the country of Portugal.
Apart from these two countries, there's also another country on the peninsula, as well as a small area which is a protectorate. The other country is Andorra, one of the smallest in Europe, located high in the Iberian Mountains, and the protectorate is Gibraltar, governed by the British authorities.