A. Mouth and mouth
B. Body wall and body wall
C. Mouth and body wall
D. Mouth and tentacles
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C. Mouth and body wall In hydra waste material of food digesion and nitrogenous waste material are removed from mouth and body wall.
C. Mouth and body wall
In hydra waste material of food digesion and nitrogenous waste material are removed from mouth and body wall.
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