Acute Gastric dilatation

Q) Not true about acute gastric dilatation (AGD) 

a) AGD is encountered most often as a postoperative complication in abdominal surgery 

b)Also seen in other  disorders, such as anorexia and bulimia nervosa, psychogenic polyphagia, trauma, diabetes mellitus 

c) When intragastric pressure from gastric distension exceeds 20 cm H2O gastric necrosis starts

d)  clinical features are pain abdomen and effortless vomiting