Given the task definition and input, reply with output. In this task, you are given a sentence in the English language. Your job is to translate the English sentence into the Spanish language.

Which of the following β2 agonists used in the treatment of asthma has an average duration of action (4-8 h) ?

¿Cuál de los siguientes agonistas β2 utilizados en el tratamiento del asma tiene una duración de acción media (4-8 h)?