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'.
Q: Question: Sulfamethoxazole is microencapsulated by complex coacervation using:
Options: <1> Gelatin and gum arabic. <2> Albumin and gum arabic. <3> Gelatine and sodium alginate. <4> Pectin and gelatin. <5> Gum arabic and pectin.
A:
1