Step 1: Understanding Goblet cells.
Goblet cells are specialized epithelial cells that secrete mucous, which acts as a protective barrier in various systems, such as the respiratory and digestive systems.
Step 2: Analyzing the options.
(A) oil: Incorrect — Goblet cells do not secrete oil; they secrete mucous.
(B) mucous: Correct — Goblet cells secrete mucous that helps protect and lubricate tissues.
(C) enzymes: Incorrect — Enzyme secretion is a function of other specialized cells, not goblet cells.
(D) hormones: Incorrect — Goblet cells do not secrete hormones.
Step 3: Conclusion.
The correct answer is (B) mucous, as goblet cells secrete mucous to protect and lubricate tissues.