This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Morphology and Physiology of Bacteria, Subject name: Microbiology
[{'content': 'True about exotoxin - \nSelect and explain. \nA. Non-antigenic, B. Enzymatic, C. Non-protein, D. Heat stable', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Enzymatic Distinguishing feature of Exotoxins and endotoxinsExotoxinsEndotoxinso Proteinso Heat labileo Secreted by cellso Action enzymico Active in minute doseo Highly antigenico Action specifically neutralised by antibodyo Specific pharmacologic effect for each toxino Can be toxoidedo Upopolysaccharideo Heat stableo Forms part of cell wrallo No enzy mic actiono Active only in large doseo Weakly antigenico Neutralisation of antibody ineffectiveo Effect nonspecifico Cannot be toxoided", 'role': 'assistant'}]