This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acute Lymphoblastic Leukemia, Subject name: Pathology
[{'content': 'Acid phosphastase cytochemical staining is used in the diagnosis of which of the following hematological neoplasms? \nSelect and explain. \nA. Chronic myeloid leukemia, B. Acute myeloid leukemia, C. B-cell acute lymphoblastic leukemia, D. T-cell acute lymphoblastic leukemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Cytochemically demonstrable acid phosphatase has main diagnostic use is in the diagnosis of T-cell ALL and hairy cell leukaemia. In T cells, acid phosphatase is an early differentiation feature. Almost all acute and chronic T-lineage leukaemias show strong activity. In T-lineage ALL, the activity is usually highly localised (polar).', 'role': 'assistant'}]