You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which of the following is a zone observed in hard palate and explain in detail?
The following zones can be observed in hard palate 

Gingival region, adjacent to the teeth.
Palatine raphae, also known as median area, extending from the incisive papillae or palatine papillae posteriorly.
Anterolateral area or fatty zone between the raphae and gingiva.
Pcsterolateral area or glandular zone between the raphae and gingiva.