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
Nasal stiffness, pan cytopenia, hypertelorisn is seen in : 
Select and explain. 
A. Osteoporosis ., B. Fibrous dyplasis., C. Marfan syndrome., D. Apert syndrome.
A: Osteoporosis .
Answer: A: Osteoporosis . 
Explanation: None