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
Howships lacunae contain: 
Select and explain. 
A. Osteocytes., B. Osteoblasts., C. Osteoclasts., D. All of the above.
A: Osteocytes.
Answer: A: Osteocytes. 
Explanation: None