This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Which of the following is cytophilic antibody - \nSelect and explain. \nA. IgM, B. IgA, C. IgE, D. IgG', 'role': 'user'}, {'content': "Answer: C \nExplanation: IgE is an 8 S molecule. Resemble IgG structurally. Heat liable - affinity for the surface of tissue cells of the same species. ( homocytotropism) - normal serum contains only traces of IgE ( a few nanograms per ml ) - greatly elevated levels in atopic conditions like asthma, hay fever. Reference : Anathanarayan & paniker's 9th edition, pg no: 98,99 <\\p>", 'role': 'assistant'}]