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
Type IV Hypersensitivity - 
Select and explain. 
A. Farmer's lung, B. Contact hypersensitivity, C. Immediate hypersensitivity, D. Myasthenia gravis
B: Contact hypersensitivity
Answer: B: Contact hypersensitivity 
Explanation: . *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