Fetal pulmonary maturity can be evaluated by phospholipid activity in amniotic fluid. In which of the following pregnancies does the fetus have the least chance of developing respiratory distress syndrome (RDS)?
Normal pregnancy; amniotic fluid L/S is 1.8:1, phosphatidyl glycerol (PG) is absent Hypeensive pregnancy; amniotic fluid L/S is 1.8:1, PG is absent Hypeensive pregnancy; amniotic fluid L/S is 2:1, PG is absent Diabetic pregnancy; amniotic fluid L/S is 2:1, PG is present