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: Anaesthesia
Malampatti grading is for – 
Select and explain. 
A. Mobility of cervical spine, B. Mobility of atlanto axial joint, C. Assessment of free rotation of neck before intubation, D. Inspection of oral cavity before intubation
D: Inspection of oral cavity before intubation
Answer: D: Inspection of oral cavity before intubation 
Explanation: Mallampati score is done for :- 

Oral cavity assessment to rule out difficult airway, and
Sleep apnea evaluation.