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: Pathology
GNAS-1 gene mutation is associated with: 
Select and explain. 
A. Fibrous dysplasia, B. Osteogenesis imperfecta, C. Amelogenesis imperfecta, D. Cleidocranial dysplasia
A: Fibrous dysplasia
Answer: A: Fibrous dysplasia 
Explanation: None