Congenital anamolies are most severe in

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 won't need any further confirmation for the answer.Various fetal defects caused d/t RubellaCardiac malformations* PDA (most common)* VSD, PS, (Coarctation of Aorta is not present)*Deafness*Cataract*Glaucoma*Retinopathy*Microcephaly*Cerebral palsy*1UGRHepatosplenomegalyMental & Motor retardationThese defects occuring singly or in combination are known as "Congenital Rubella Syndrome"