This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'A patient gets reccurent urticaria while doing exercise and on exposure to sunligh. Which of the following is most like cause – \nSelect and explain. \nA. Chronic Idiopathic Utricaria, B. Universal dermographism, C. Cholinergic utricaria, D. photodermatitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This patient develops urticaria after:-\n\n\nExercise\nExposure to sunlight → generalized heating\n\n\nBoth of these provoke cholinergic urticaria due to stimulation of cholinergic sympathetic fibres.', 'role': 'assistant'}]