This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
The commonest intracavitary benign cardiac tumour is 
Select and explain. 
A. Leiomyoma, B. Myxoma, C. Sarcoma, D. Lipoma
B: Myxoma
Answer: B: Myxoma 
Explanation: Myxoma, a benign tumor, is the most common type of primary cardiac tumor. Cardiac tumors may occur in any cardiac tissue. They can cause valvular or inflow-outflow tract obstruction, thromboembolism, arrhythmias, or pericardial disorders. Diagnosis is by echocardiography and frequently cardiac MRI. Ref Davidson 23rd edition pg 455