This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunity, Subject name: Pathology
[{'content': 'Which among the following hypersensitivity cannot be detected by skin test \nSelect and explain. \nA. Type 1, B. "type 2, C. Type 3, D. Type 4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans b: (Ref: ROBBINS 7th edition-210)Type 1: Immediate hypersensitivity- Involves Ig E mediated release of histamine & other mediators from mast cells & basophilsEg: Skin tests-Casoni\'s testType 2: Antibody mediated - Involves IgG or IgM with subsequent complement fixationType 3: Immune compex mediated- Involve circulating Ag-Ab complex that deposit in venules with subsequent complement fixation* systemic- serum sickness -skin, joint, lungs, kidney, blood vessels* localized - arthus reaction - skinType 4: Delayed hypersensitivity-mediated by T cells Eg: Tuberculin tests, Lepromin tests"Examples of types of reationare given in previous, please go through it"', 'role': 'assistant'}]