Read the statements below regarding the nucleus of a cell. Identify them as true or false and select the correct combination option.
I. The nucleus displays an elaborate nucleoprotein fiber called chromatin during the interphase of the cell cycle.
II. The space between the parallel membranes of the nuclear envelope is called the nucleoplasm.
III. Nucleus was discovered first by Flemming.
IV. The nuclear pores within the nuclear envelope are formed by the fusion of both membranes.
`{:("No.",I,II,III,IV),(1,"True","True","False","False"),(2,"True","False","False","False"),(3,"True","True","False","False"),(4,"True","False","False","True"):}`

Options

A. 1
B. 2
C. 3
D. 4

Answer

To solve the question regarding the statements about the nucleus of a cell, we will evaluate each statement one by one and determine whether they are true or false.

### Step-by-Step Solution:

1. **Statement I: The nucleus displays an elaborate nucleoprotein fiber called chromatin during the interphase of the cell cycle.**
- **Evaluation:** This statement is **True**. During interphase, the genetic material in the nucleus is in the form of chromatin, which is a complex of DNA and proteins (histones).

2. **Statement II: The space between the parallel membranes of the nuclear envelope is called the nucleoplasm.**
- **Evaluation:** This statement is **False**. The space between the two membranes of the nuclear envelope is called the **perinuclear space**, not nucleoplasm. Nucleoplasm refers to the substance within the nucleus itself.

3. **Statement III: Nucleus was discovered first by Flemming.**
- **Evaluation:** This statement is **False**. The nucleus was discovered by **Robert Brown** in 1831. Flemming is known for his work on chromatin and cell division, not for the discovery of the nucleus.

4. **Statement IV: The nuclear pores within the nuclear envelope are formed by the fusion of both membranes.**
- **Evaluation:** This statement is **True**. Nuclear pores are formed where the inner and outer membranes of the nuclear envelope fuse, allowing for the transport of materials in and out of the nucleus.

### Summary of Evaluations:
- Statement I: True
- Statement II: False
- Statement III: False
- Statement IV: True

### Correct Combination:
Based on the evaluations, the correct combination of true and false statements is:
- I: True
- II: False
- III: False
- IV: True

This corresponds to option **4: (True, False, False, True)**.

### Final Answer:
The correct answer is **Option 4**.

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