<prompt> Endotracheal tube level is5 cms above xiphisternum4 cms above carnia1 cm above carniaAt carnia  <response>: Ideally, the tube tip should be 5 2 cm from the carina when the head and neck are in neutral position.___ Fundamental of anaesthesiaNeck flexion causes a 2 cm descent of endotracheal tube towards carina, and neck extension causes a 2cm ascent of trachial tube tip from the carina. Therefore correct position of tip of the tube is :-5 2 cm from carina When neck is neutral3 2 cm from carina When neck is flexed7 2 cm from carina When neck is extended 