This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pediatrics
[{'content': 'A 7 yr old boy underwent neurosurgery for craniopharyngioma following which pituitary functions were lost. Which of the following hormone should be replaced first ? \nSelect and explain. \nA. Hydrocoisone, B. Thyroxine, C. Growth hormone, D. Prolactin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Hydrocoisone is a coicosteroid mainly used for anti inflammatory action. It may have lot of side effects due to a neurosurgery. Hence, it should be first replaced after a surgery Reference: GHAI Essential pediatrics, 8th edition', 'role': 'assistant'}]