13.食道蠕動異常疾病必須依賴motility study (manometry)做鑑別診斷,附圖(甲)由上至下依序為pharynx至lower esophageal sphincter之健康受試者圖形,(乙)(丙)(丁)(戊)則為四種常見蠕動異常疾病患者,請問何者正確?