Answer: The correct answer is- C) Protists.
Dysentery is an inflammatory disease of the intestine, especially of the colon region ( a part of large intestine) that causes extensive pain in the abdomen and severe diarrhea. Apart from this, it also includes symptoms such as fever and an incomplete defecation feeling.
Amoebic dysentery is also known as amoebiasis and caused by Entamoeba histolytica, which is a protist.