The answer is A: True.
Goblet cells are indeed present in pseudostratified ciliated columnar epithelium, which is typically found lining the respiratory tract. These specialized epithelial cells serve an important function: they secrete mucus. The mucus traps particulate matter, pathogens, and irritants, helping to keep the airways clear and facilitating the movement of cilia, which also play a role in clearing debris from the respiratory system.
In summary, recognizing that goblet cells are an integral part of this type of epithelium helps to understand the role of mucus in protecting the respiratory system and maintaining overall respiratory health.