This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Long connective tissue papillae and keratinized epithelia are a feature of these parts of oral mucosa 
Select and explain. 
A. gingiva and alveolar mucosa, B. hard palate and gingiva, C. buccal and alveolar mucosa, D. hard and soft palate
B: hard palate and gingiva
Answer: B: hard palate and gingiva 
Explanation: None