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
The direction of resorption of the maxillary ridge is: 
Select and explain. 
A. Downwards and buccally, B. Upwards and lingually, C. Downwards and lingually, D. Upwards and buccally
B: Upwards and lingually
Answer: B: Upwards and lingually 
Explanation: The maxilla resorbs in a superioposterior direction, and the mandible resorbs in an inferioanterior direction.

This will lead to confinement of maxillary arch within the mandibular arch in longstanding edentulous situations, giving a pseudo-class III ridge relationship.