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': "Type IV Hypersensitivity - \nSelect and explain. \nA. Farmer's lung, B. Contact hypersensitivity, C. Immediate hypersensitivity, D. Myasthenia gravis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: . *contact dermatitis is a common example of tissue injury resulting from delayed type hypersensitivity reaction. It may evoked by contact with chemicals that bind to and structurally modifies some cell proteins and peptides derived from these modified proteins are recognised by T cells and elicit the reaction.Robbins and Cotran pathologic basis of disease South Asia edition', 'role': 'assistant'}]