<prompt>  Fetal pulmonary maturity can be evaluated by phospholipids 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 LS is 1.8:1, phosphatidyl glycerol PG is absentDiabetic pregnancy: amniotic fluid LS is 2:1, PG is absentDiabetic pregnancy: amniotic fluid LS is 2:1, PG is present.All of the above 