Infective state of Entamoeba histolytica is

Spore

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Tetranucleated cyst

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Egg

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Trophozoite

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Solution

The correct option is D Tetranucleated cyst
Entamoeba histolytica complete its life cycle in two stage on one host only infective stage and colon invasive trophozoite stage. In infective stage, infection occurs by the ingestion of tetranucleated cyst through the contaminated food and water. So, the correct answer is option B.

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