<prompt> The most distinctive feature of pathogenic E. histolytica on fresh stool examination is:Presence of active pseudopodiaErythrophagocytosisPresence of intracytoplasmic vacuolePresence of two nucleoli  <response>: The trophozoites from acute dysentric stools often contain phagocytosed erythrocytes. This feature is diagnostic and distinctive as phagocytosed red cells are not found in any other commensal intestinal amoebae. 