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 thromboxanes: 
 Options:  <1> They induce platelet aggregation. <2> They inhibit platelet aggregation. <3> They act as bronchodilators in the respiratory system. <4> They are produced in the membranes of all cells. <5> They are derived from saturated fatty acids.
