question: Q:A healthy 33-year-old gravida 1, para 0, at 15 weeks' gestation comes to the genetic counselor for a follow-up visit. Her uncle had recurrent pulmonary infections, chronic diarrhea, and infertility, and died at the age of 28 years. She does not smoke or drink alcohol. The results of an amniotic karyotype analysis show a deletion of Phe508 on chromosome 7. This patient's fetus is at greatest risk for developing which of the following complications?? 
  {'A': 'Duodenal atresia', 'B': 'Congenital megacolon', 'C': 'Cardiac defects', 'D': 'Meconium ileus', 'E': 'Neural tube defects'},