The correct option is B Crypts of Lieberkuhn
Crypts
of Lieberkuhn are simple tubular glands which occur throughout the small
intestine between the villi. Succus entericus is secreted by crypts of
Lieberkuhn. Succus entericus is also known as intestinal juice. It has pH 7.8.
Every day 2,000-3,000 ml of succus entericus is secreted. It contains many
enzymes like maltase, isomaltase, sucrose, lactase, enterokinase, etc.