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
[{'content': 'Cardiac myxoma most common seen in ? \nSelect and explain. \nA. Right Atrium, B. Right Ventricle, C. Left Atrium, D. Left Ventricle', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Left AtriumCardiac myxomasMost common primary tumor of the adult hea.Benign neoplasms thought to arise from primitive multipotentmesenchymal cells.Familial syndromes associated with myxomas have activating mutations in the GNAS1 gene, encoding a subunit of G protein (Gsa) (in association with McCune-Albright syndrome) or null mutations in PRKAR1A, encoding a regulatory subunit of a cyclic-AMP- dependent protein kinase (Carney complex).About 90% of myxomas arise in the atria, with a left-to-right ratio of approximately 4 : 1.", 'role': 'assistant'}]