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': 'Which of the following drugs required a dose adjustment in patient during radiotherapy in order to present radiation toxicity ? \nSelect and explain. \nA. Vincristine, B. Dactinomycin, C. Cyclophosphamide, D. 6-Mercaptopurine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Dactinomycin o Like anthracyclines (doxo and daunorubicin), dactinomycin can also cause radiation recall syndrome and the dose should be adjusted with radiotherapy.", 'role': 'assistant'}]