This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pre Anesthetic Evaluation, Subject name: Anaesthesia
Difficulty in laryngoscopy and intubation is seen in all except: 
Select and explain. 
A. Cervical joint immobility, B. Modified mallampati class 2, C. Upper lip bite test negative., D. Interincisor gap of <3cm
B: Modified mallampati class 2
Answer: B: Modified mallampati class 2 
Explanation: Modified mallampati classification 1 and 2 no difficulty Modified mallampati classification 3 and 4 difficulty in intubation. Mallampati classification - Standard for assessing the relationship of the tongue size relative to oral cavity. Rest all are predictors of difficult airway 1. Interincisor gap of <3 indicates inadequate mouth opening. 2. Upper lip bit test negative again predictor of difficult airway 3. Cervical joint immobility indicates difficulty in positioning.