This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'ALL , morphology is a malignancy arising from which cell lineage - \nSelect and explain. \nA. Mature B cell, B. Precursor B cell, C. Immature T cell, D. Mixed B cell & T cell', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Acute Lymphoblastic Leukemia/ Lymphoma (ALLs) are neoplasms composed of immature B ( pre-B) or T(pre-T) cells ,which are referred to as lymphoblasts. Ref :Robbins pathologic basis of disease ; south east asia edition ;pg:590', 'role': 'assistant'}]