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: Medicine
Square root sign is an indication of - 
Select and explain. 
A. Constrictive pericarditis, B. Hypertropic cardiomyopathy, C. Restrictive cardiomyopathy, D. None of the above
A: Constrictive pericarditis
Answer: A: Constrictive pericarditis 
Explanation: None