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A patient is suspected of having amebic dysentery. Upon microscopic examination of a fresh fecal specimen for ova and parasites, the following data were obtained:

A trophozoite of 25 µm
Progressive, unidirectional crawl
Evenly distributed peripheral chromatin
Finely granular cytoplasm

This information probably indicates:
A) Entamoeba coli
B) Entamoeba histolytica
C) Endolimax nana
D) Iodamoeba butchlii