Prussak's space is seen in ?

Ans. is 'a' i.e., EpitympanumPrussak's space is a small space between the shrapnel's membrane/pars flaccida laterally. neck of malleus medially, sho process of malleus below and lateral process of malleus above.Prussak's space communicates with epitympanum through a posterior gap.Prussak's space is impoant because it is a site for pars flaccida acquired cholesteatoma formation.