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
'Torque' in orthodontics refers to: 
Select and explain. 
A. The change in mesiodistal inclination of teeth, B. The change in labiolingual inclination of teeth, C. The rotation of teeth, D. None of the above
B: The change in labiolingual inclination of teeth
Answer: B: The change in labiolingual inclination of teeth 
Explanation: Clinical heights of the crowns, contact areas, their tip (mesio distal angulations) and torque (labiolingual inclination) contribute to the aesthetics of the smile. 
Therefore torque refer to the labiolingual inclination of the teeth.
Reference: Orthodontics: Diagnosis and Management of Malocclusion and Dentofacial Deformities 3rd O P Kharbanda, pdf no 789