This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Cytokines- \nSelect and explain. \nA. Includes interleukins, B. Produce only in sepsis, C. Are polypeptide (complex protein), D. Highly specific action', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Robbins basic pathology 9th edition page no 48 Molecularly characterized cytokines are called interleukins. The four-a-helix bundle family: member cytokines have three-dimensional structures with four bundles of a-helices. This family, in turn, is divided into three sub-families: the IL-2 subfamily the interferon (IFN) subfamily the IL-10 subfamily. The first of these three, the IL-2 subfamily, is the largest. It contains several non-immunological cytokines including erythropoietin (EPO) and thrombopoietin(TPO). Fuhermore, four-a-helix bundle cytokines can be grouped into long-chain and sho-chain cytokines', 'role': 'assistant'}]