The correct option is D acidic, alkaline
Chyme is the pulpy acidic fluid which passes from the stomach to the small intestine, consisting of gastric juices and partly digested food. When it enters the duodenum, it is acidic in nature due to the action of hydrochloric acid from the stomach. But since the pancreatic enzymes activate and operate in an alkaline medium, chyme is transformed into an alkaline medium by the bile secreted into the small intestine.