Q: 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'.
Question: The septic shock that can occur in the course of systemic infections due to Gram-negative bacteria is due to:
Options: <1> Lipopolysaccharide. <2> Peptide-glucan. <3> Teicoic acids. <4> Flagellin <5> K. Antigen
A:
1