"Endomitosis" refers to
(a) Division of nucleus without chromosomal division
(b) Division of chromosome without nuclear division
(c) Division of cytoplasm
(d) None of these

Options

A. Division of nucleus without chromosomal division
B. Division of chromosome without nuclear division
C. Division of cytoplasm
D. None of these

Answer

To solve the question regarding "Endomitosis," we need to analyze the term and the options provided carefully.

### Step-by-Step Solution:

1. **Understanding Endomitosis**:
- Endomitosis is a specific type of cell division where the chromosomes replicate, but the nucleus does not divide. This means that the cell undergoes a process where the chromosomal material is duplicated, leading to an increase in the number of chromosomes within the same nucleus.

2. **Analyzing the Options**:
- **Option (a)**: Division of nucleus without chromosomal division.
- This is incorrect because endomitosis involves chromosomal division, not just nuclear division.
- **Option (b)**: Division of chromosome without nuclear division.
- This is correct. In endomitosis, chromosomes divide, but the nuclear envelope remains intact, meaning there is no nuclear division.
- **Option (c)**: Division of cytoplasm.
- This is incorrect as endomitosis specifically refers to the behavior of chromosomes and the nucleus, not the cytoplasm.
- **Option (d)**: None of these.
- This is not applicable since we have identified option (b) as correct.

3. **Conclusion**:
- Based on the definitions and analysis, the correct answer is **(b) Division of chromosome without nuclear division**.

### Final Answer:
(b) Division of chromosome without nuclear division.