<prompt> Risk of congenital defects in a baby is maximum, if the gestational age at the time of maternal rubella infection is:11 weeks11-12 weeks13-14 weeks15-16 weeks  <response>: a. 11 weeksRef: Nelsons 20e p 1548-1551Risk of congenital defects in a baby is maximum, if mother acquires Rubella in the first trimester before 11 weeks. 