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: Radiology
"Square root sign" is a radiological finding of 
Select and explain. 
A. Constrictive pericarditis, B. HOCM, C. ASD, D. Pleuro - pericardial cyst
A: Constrictive pericarditis
Answer: A: Constrictive pericarditis 
Explanation: "Square root sign" - Contrictive pericorditis.
Ground glass ventricular septum - HOCM.