This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy Pa 1, Subject name: Radiology
[{'content': 'Intracranial Irradiation most commonly leads to deficiency of \nSelect and explain. \nA. TSH, B. ACTH, C. PROLACTIN, D. GROWTH HORMONE', 'role': 'user'}, {'content': 'Answer: D \nExplanation: *Growth Hormone is most radiosensitive pituitary hormone and intracranial irradiation leads to hypopituitarism mainly due to hypothalamic damage rather than pituitary damage *Least radiosensitive pituitary hormone is TSH', 'role': 'assistant'}]