<prompt> A patient who underwent extensive bowel resection is on total parenteral nutrition TPN for 1 month. Endoscopy done after one month reveals diffuse gastric mucosal atrophy. Which enzyme deficiencies are most likely responsible for gastric mucosal atrophy in this patient?Gastrin and ghrelinSecretin and CCKGastrin and CCKGastrin and secretin  <response>: Ans. c Gastrin and CCKRef: Yamadas Textbook of Gastroenterology,5th ed p.284Gastrin and CCK deficiencies can cause Gastric mucosal atrophy 