Entamoeba histolytica is responsible for………..in human beings
D.All of the above

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Hint: The protozoan parasite and causative agent of amebiasis in humans is Entamoeba histolytica. Via infected food and water, parasite cysts are transmitted, making the incidence of disease high in poor sanitation areas. It may also, by direct contact with fecal matter, penetrate the body.

Complete answer:
-Dysentery: Dysentery is an inflammation of the bowel, especially the colon. Shigella bacteria are typically the cause of dysentery, in which case it is known as shigellosis, or Entamoeba histolytica amoeba. Other chemicals, other bacteria, other protozoa, or parasitic worms may be other sources. It can spread between individuals. Hence option A is correct.
-Diarrhoea: Diarrhea is typically caused by infections or stress caused by bacteria and lasts many days. Via infected food or water, many types of bacteria can invade your body and cause diarrhea. Campylobacter link, Escherichia coli link (E. coli), Salmonella link, and Shigella link are common bacteria that cause diarrhea. Hence option B is incorrect.
-Hepatitis: Hepatitis refers to a disease of the liver that is inflammatory. A viral infection is usually caused by it, although there are other potential causes of hepatitis. This involves hepatitis and autoimmune hepatitis that occurs as a secondary effect of medications, drugs, toxins, and alcohol. Hence option C is incorrect.
Hence option A: Dysentery is the correct answer.

Note: Entamoeba is a parasite of single-celled protozoans belonging to the Rhizopoda class. It is an intestinal parasite in humans and induces amoebic dysentery. Watery stools overflowing with mucus and stomach pain are the symptoms of the disease.