This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
[{'content': 'Laron dwarfism is caused by \nSelect and explain. \nA. Deficiency of GH, B. GH receptor defect, C. Deficiency of thyroxin, D. Thyroxin receptor defect', 'role': 'user'}, {'content': "Answer: B \nExplanation: Laron syndromeDwarfDevelopment of end-organ resistance to growth hormone(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 2640-2641)", 'role': 'assistant'}]