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: Pharmacology
[{'content': 'The most impoant target of action of chlorambucil is - \nSelect and explain. \nA. Myeloid tissue, B. Lymphoid tissue, C. Neural tissue, D. Skin', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Lymphoid tissue o Chlorambucil is a very slow acting alkylating agent especially active on lymphoid tissue; myeloid tissue is largely spared.", 'role': 'assistant'}]