This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Eczema and related disorders, Subject name: Dental
[{'content': "Darier's sign is associated with ? \nSelect and explain. \nA. Uicaria, B. Smooth muscle hamaoma, C. Uicaria pigmentosa, D. Atopic dermatitis", 'role': 'user'}, {'content': "Answer: C \nExplanation: Options Associated with Uicaria Dermographism Smooth ms hamaoma Pseudo Darier sign Uicaria pigmentosa Darier's sign Atopic dermatitis White dermographism Darier's Sign - Mast cell release histamine - Histamine vasodilates vessels producing erythematous lesion.", 'role': 'assistant'}]