The correct answer is option 'A': One.

- The trophozoite stage of Entamoeba histolytica is the active feeding stage of the parasite. It is responsible for causing amebic dysentery and other intestinal infections in humans.

- Pseudopodia are temporary cytoplasmic extensions that the trophozoite uses for locomotion and feeding.

- The trophozoite of Entamoeba histolytica typically has a single pseudopodium or false foot. This pseudopodium is usually broad and finger-like in shape.

- The pseudopodium helps the trophozoite to move and capture food. It is formed by the extension and retraction of the cytoplasm, allowing the organism to change its shape and move in the direction of its pseudopodium.

- The formation of pseudopodia is a characteristic feature of amoeboid organisms, including Entamoeba histolytica.

- The presence of a single pseudopodium in the trophozoite of Entamoeba histolytica distinguishes it from other amoebas, such as Entamoeba coli, which may have multiple pseudopodia.

- The formation and movement of pseudopodia enable Entamoeba histolytica to invade and destroy the intestinal lining, causing the symptoms of amebic dysentery.

- It is important to note that the trophozoite stage of Entamoeba histolytica is the infective stage, while the cyst stage is responsible for transmission of the parasite.

- Understanding the characteristics and life cycle of Entamoeba histolytica is crucial for the diagnosis, treatment, and prevention of amebic infections.

In summary, the trophozoite of Entamoeba histolytica typically has a single pseudopodium, which is used for locomotion and feeding.