Gastric juice does not typically cause a burning sensation within the stomach. but reflux of gastric juice into the esophagus can cause a burning sensation. one reason for the burning sensation caused by the gastric reflux is that the esophagus

secretes mucus that is not identical to stomach mucus
is internally lined by epithelial cells that are in direct physical contact with the contents of the esophagus
has enzymes that react with stomach acid to cause a burning sensation
none of the listed responses is correct