Sphenoidal air sinus drains into :

Has an opening for nasolacrimal duct :

The trachea arises from the lower end of the larynx at the level of :

The nasal cavity is supplied by which of the following nerves :

M.tuberculosis may grow after 4 weeks :

M.tuberculosis grows aerobically at 25°C:

M.tuberculosis grows aerobically at 37°C:

On satellitism test staphylococcus aureus produces factor X in nutrient agar :

On satellitism test staphylococcus aureus produces factor X in blood agar :

S.pyogenes is sensitive with bacteracin:

S.pneumoniae is sensitive with bacteracin:

S.pneumoniae is sensitive with optichin :

M.tuberculosis may grow after 2 weeks :

In bile solubility test s.pneumoniae appears clear tube :

In bile solubility test H.influenza appears clear tube :

H.influenza can grow on chocolate agar :

S.pneumonia can grow on chocolate agar :

AFB stain with methyline blue stain:

H.influenza growth needs factor X and factor V :