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
Proper technique of endotracheal intubation involves: March 2012 
Select and explain. 
A. Flexion of neck, B. Flexion of the neck and extension of the atlantooccipital joint, C. Extension of the neck, D. Extension of the neck and flexion of the atlantooccipital joint
B: Flexion of the neck and extension of the atlantooccipital joint
Answer: B: Flexion of the neck and extension of the atlantooccipital joint 
Explanation: Ans: B i.e. Flexion of the neck and extension of the atlanto-occipital joint Optimal head and neck positioning while intubation is obtained by flexion of the neck and extension of the atlanto-occipital joint