During laryngoscopy and intubation procedure, all of these are true, except:

Ans: D. After inseion of laryngoscope, it is levered on the upper incisor to pull up the tongue and visualize the vocal cords(Ref: Miller 81c, p I 666-7667. 71e p1587).The laryngoscope should never be hinged on the teeth to lift up the epiglottis.The patient is aligned in a "sniffing" position, i.e. neck (atlanto-axial joint) flexion and face extension (atlanto-occipital joint), at around 35deg and 15deg respectively