Position for orotracheal intubation: (A) Extension of neck and atlanto-occipital joint, (B) Extension of only neck, (C) Flexion of neck only, (D) Flexion of neck and extension of atlanto-occipital joint
Answer is D. Flexing of cervical joint at neck approx. 25-30degrees and extension of atlanto -occipital joint (head) approx. 85-110degrees enables oropharyngeal, pharyngolaryngeal and laryngotracheal axis in one line that allows easy intubation -This position is called as SNIFFING POSITION.