Gastroesophageal reflux disease or more commonly known as GERDs is a type of long-term indigestion and occurs when gastric acid flows back into the esophagus, damaging the esophagus tissue. What is GERDs?
 1) A condition where gastric acid flows back into the esophagus
 2) A type of long-term indigestion
 3) A disease that damages the esophagus tissue
 4) A condition caused by excessive gastric acid production