The cytoskeletal elements are involved in :
(i) Amoeboid movement
(ii) separation of chromosomes
(iii) Ciliary movement
(iv) Formation of cell plate

Options

A. i, ii and iv
B. i, ii and iii
C. ii, iii and iv
D. i, ii , iii and iv

Answer

To solve the question regarding the involvement of cytoskeletal elements in various biological processes, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Amoeboid Movement**:
- Amoeboid movement is primarily facilitated by the cytoskeletal element known as **microfilaments** (actin filaments). These filaments allow the cell to change shape and move by extending and contracting.
- **Conclusion**: Cytoskeletal elements are involved in amoeboid movement.

2. **Separation of Chromosomes**:
- During cell division, the separation of chromosomes is carried out by **microtubules**. These structures form the spindle fibers that pull the chromosomes apart during mitosis and meiosis.
- **Conclusion**: Cytoskeletal elements are involved in the separation of chromosomes.

3. **Ciliary Movement**:
- Cilia and flagella are composed of **microtubules** arranged in a specific pattern (9+2 arrangement). The movement of these structures is powered by the sliding of microtubules against each other.
- **Conclusion**: Cytoskeletal elements are involved in ciliary movement.

4. **Formation of Cell Plate**:
- During plant cell division, the formation of the cell plate is also mediated by **microtubules**. They help in the transport of vesicles that contain cell wall materials to the center of the dividing cell, forming the cell plate.
- **Conclusion**: Cytoskeletal elements are involved in the formation of the cell plate.

### Final Conclusion:
Since all four options (i, ii, iii, and iv) involve cytoskeletal elements, the correct answer is that cytoskeletal elements are involved in all of the listed processes.