Detailed Instructions: 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: The most important proteoglycan in hyaline cartilage is:
Options: <1> Agrecano <2> Chondroitin sulfate 4. <3> Heparin. <4> Versicano <5> Dermatan sulfate.
A:
1