<prompt> A patient presents with diarrhea. analysis of stool on wet mount shows mobile protozoa without RBCs and pus cells. The diagnosis isBalantidium coliGiardiasisTrichomonas hominisEntamoeba histolytica  <response>: Mobile protozoa with the absence of RBCs and pus cells in stools in a patient with diarrhoea suggests giardiasis.In balantidium coli and entamoeba histolytica infections, pus cells and RBCs will be present in stools.Trichomonas hominis is considered as non-pathogenic 