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: Pediatrics
Laron dwarfism is caused by ? 
Select and explain. 
A. Deficiency of GH, B. GH receptor defect, C. Deficiency of thyroxin, D. Thyroxin receptor defect
B: GH receptor defect
Answer: B: GH receptor defect 
Explanation: Ans. is 'b' i.e., GH receptor defect Laron syndrome Dwarf Development of end organ resistance to growth hormone.