<prompt> The commonest valvular manifestation of acute as well as previous rheumatic carditis isMitral stenosisMitral regurgitationAoic stenosisAoic regurgitation  <response>: Mitral regurgitation MR is the commonest manifestation of acute as well as previous rheumatic carditis. Reference: Essential Paediatrics; O.P. Ghai; Page no: 438 