The active form of Entamoeba histolytica feeds upon

1. Food in intestine
2. Erythrocytes; mucosa and submucosa of colon
3. Blood only
4. Mucosa and submucosa of colon only

The correct option is B Erythrocytes; mucosa and submucosa of colon
Trophozoite

• Trophozoite stage is the most active, motile, feeding and pathogenic stage of Entamoeba.
• It lives in the mucosa and submucosa membranes of the large intestine and feeds upon the mucosa and submucosa of the colon along with the erythrocytes.

Final answer

$c.$ Erythrocytes; mucosa and submucosa of colon