The correct option is B GIP
Hormones can be stimulatory i.e. increase the secretion of the hormone from the gland or inhibitory i.e. reduce or bring down the secretion of the gland.
GIP is a gastric inhibitory peptide hormone secreted by endocrine cells of the gastrointestinal tract. It is an inhibitory hormone as it inhibits gastric secretion and motility.
Erythropoietin is a peptide hormone secreted by the juxtaglomerular cells of the kidney. It stimulates the process of RBC (red blood cells) synthesis called erythropoiesis.
Cholecystokinin (CCK) stimulates the secretion of pancreatic enzymes and bile juice by pancreas and gallbladder respectively.
Gastrin acts on gastric glands. It is responsible for secretion of hydrochloric acid and pepsinogen.