This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': "Prussacks's space is situated in- \nSelect and explain. \nA. Epitympanum, B. Hypotympanum, C. Mesotympanum, D. Eustachian Tube", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Epitympanum o Prussak's space is a small space between the shrapnel's membrane / pars flaccida laterally, neck of malleus medially, short process of malleus below and lateral process of malleus above.o Prussak's space communicates with epitympanum through a posterior gap.o Prussak's space is important because it is a site for pars flaccida acquired cholesteatoma formation.", 'role': 'assistant'}]