Which of the following is responsible for division of fertilized egg :-

Options

A. Centrioles of ovum
B. Distal centriole of sperm
C. Karyomeres
D. Proximal centriole of sperm

Answer

To solve the question "Which of the following is responsible for the division of the fertilized egg?", we need to analyze the options provided and understand the role of centrioles in fertilization and subsequent cell division.

### Step-by-Step Solution:

1. **Understand the Context**: After fertilization, the fertilized egg (zygote) undergoes a series of divisions known as cleavage. This process is crucial for the development of the embryo.

2. **Identify the Options**: The options given are:
- A) Centrioles of ovum
- B) Distal centriole of sperm
- C) Cariomeres
- D) Proximal centriole of sperm

3. **Analyze Each Option**:
- **Option A: Centrioles of ovum**: The ovum does contain centrioles, but they are not primarily responsible for the division of the fertilized egg.
- **Option B: Distal centriole of sperm**: This centriole is involved in the formation of the sperm tail and does not play a direct role in the division of the fertilized egg.
- **Option C: Cariomeres**: This term refers to the cells of the blastula and is not responsible for the initial division of the fertilized egg.
- **Option D: Proximal centriole of sperm**: This is the correct option. The proximal centriole is responsible for forming spindle fibers (aster rays) during cell division, which are crucial for the separation of chromosomes.

4. **Conclusion**: The proximal centriole of sperm is responsible for the division of the fertilized egg, making option D the correct answer.

### Final Answer:
**D) Proximal centriole of sperm**