Definition: In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
Input: Question: The stimulation of the carotid bodies: 
 Options:  <1> Decreases the pH of arterial blood. <2> PCO2 decreases in arterial blood. <3> Increases the arterial concentration of bicarbonate. <4> Increases the urinary excretion of sodium. <5> Lowers blood pressure
