This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Inflammatory carcinoma is classified under \nSelect and explain. \nA. T4a, B. T4b, C. T4c, D. T4d', 'role': 'user'}, {'content': "Answer: D \nExplanation: T1<= 2cm T2>2 cm but <= 5cmT3> 5cmT4aExtension to the chest wall (invasion of pectoralis only is not extension to the chest wall)T4bSkin involvement (including peau d'orange) that doesn&;t meet criteria of skin involvementT4cBoth T4a and T4b are presentT4dInflammatory carcinomaRef: AJCC 8th edition", 'role': 'assistant'}]