This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Of the following Exotoxins are - \nSelect and explain. \nA. Lipopolysaccharide in nature, B. Produced by grma -ve bacilli, C. Highly antigenic, D. Very stable and resistant to chemical agents', 'role': 'user'}, {'content': "Answer: C \nExplanation: Table 8.1 EXOTOXINS Proteins heat labile actively secreted by cells diffuse into surrounding medium readily separable from cultures by physical means such as filtration action often enzymatic specific pharmacological effects for each exotoxin specific tissue affiinities active in very minutes dose highly antigenic action specifically neutralised by antibody Ref Ananthanarayan & paniker's Textbook of microbiology 9th edition pg no 75", 'role': 'assistant'}]