This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pathology
MC valve involved in Rheumatic fever - 
Select and explain. 
A. Mitral, B. Aoic, C. Pulmonary, D. Tricuspid
A: Mitral
Answer: A: Mitral 
Explanation: Rheumatic fever is an acute , immunologically mediated multisystem inflammatory disease that occurs after group A streptococcal infection The valvular disease principally takes the form of deforming mitral stenosis; indeed rheumatic hea disease is essentially the only cause of acquired mitral stenosis Robbins 9 th page no. 391