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
True statement about rheumatization of MV - 
Select and explain. 
A. Fusion & shoening of chordae tendineae in MS, B. Calcification of MV, C. Aoic dilation, D. Annular involvement
A: Fusion & shoening of chordae tendineae in MS
Answer: A: Fusion & shoening of chordae tendineae in MS 
Explanation: Mitral stenosis is a narrowing of the mitral valve opening that blocks (obstructs) blood flow from the left atrium to the left ventricle. Mitral stenosis usually results from rheumatic fever, but infants can be born with the condition. Mitral stenosis does not cause symptoms unless it is severe Mitral valve stenosis Usually a childhood disease, rheumatic fever results from the body's immune response to a streptococcal bacterial infection. Rheumatic fever is a serious complication of strep throat or scarlet fever. The organs most affected by acute rheumatic fever are the joints and the hea Ref Davidson edition23rd pg 450