Pierre Robbin syndrome is -: (A) Cleft palate with syndactly, (B) Cleft palate with mandibular hypoplasia and respiratory obstruction, (C) Cleft lip with mandibular hypoplasia, (D) Cleft lip
Answer is B. Pierre Robbin syndrome comprises

isolated cleft palate
retrognathia (posteriorly displaced mandible)
glossoptosis (posteriorly displaced tongue)
early respiratory & feeding difficulties