Achalasia pressures

Q All are true about achalasia except

A. Type 1  Achalasia is characterized by 100% failed contractions (DCI<100) and no esophageal pressurisation

B. Type 3 Achalasia has premature contractions in at least 20% swallows

C. IEM (Ineffective esophageal motility) is characterized by >20% ineffective swallows (DCI<450)

D. Patients with type 2 achalasia have the best response to therapy