11. The locomotory structure in Paramecium is A. cilium, B. cytoplasm, C. flagellum, D. pseudopodium

Cilia

Explanation:

Paramecium uses cilia from locomotion, Its body is  covered with thousand of cilia

A. Cilium

Explanation:

Its whole body is covered with small hair-like filaments called the cilia which helps in locomotion. There is also a deep oral groove containing not so clear oral cilia. The main function of this cilia is to help both in locomotion as well as dragging the food to its oral cavity.