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
Posselt's diagram indicates? 
Select and explain. 
A. Motion of mandible, B. Protrusive relation of central incisor, C. Antero-superior relation of condyle in articular fossa in CR, D. None of the above
A: Motion of mandible
Answer: A: Motion of mandible 
Explanation: None