In patients with facial disproportion producing malocclusion: (A) an osteotomy alone in the mandibular ramus can be used to close an anterior open bite., (B) a sagittal split osteotomy commonly produces inferior dental nerve paraesthesia, (C) an intra oral vertical sub sigmoid osteotomy is appropriate for treating mandibular retrognathia., (D) following a down fracture of the maxilla at Le Fort I level the blood supply to the alveolus relies only on the integrity of the greater palatine artery
Answer is B. None