Crypts of Lieberkuhn (intestinal glands) are simple tubular glands that lie between the finger-like projections of the inner surface of the small intestine. They secrete various enzymes, including sucrase and maltase that help to secrete mucous in the stomach and intestinal lining. They also secrete a hydrochloric acid which helps to regulate the acidity and alkalinity of the stomach. Thus, the correct answer is option B.