<prompt> Congenital anamolies are most severe inRubella infectionMumpsCMVToxoplasma  <response>: Ans. is a Rubella infectionRubella causes numerous serious defects in the fetus, but nowhere is it specifically written that it causes most severe congenital deformities. Just have a look at the various defects caused by Rubella and you wont need any further confirmation for the answer.Various fetal defects caused dt RubellaCardiac malformations PDA most common VSD, PS, Coarctation of Aorta is not presentDeafnessCataractGlaucomaRetinopathyMicrocephalyCerebral palsy1UGRHepatosplenomegalyMental Motor retardationThese defects occuring singly or in combination are known as Congenital Rubella Syndrome 