Four different steps that occur during meiosis are given in the following list.
(i) Complete separation of chromatids
(ii) Pairing of homologous chromosomes
(iii) Lining up of paired chromosomes on equator
(iv) Crossing over between chromatids
Select the correct sequential arrangement of the steps.

Options

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

Explanation

To determine the correct sequential arrangement of the steps that occur during meiosis, we can analyze the steps provided:

1. **Pairing of homologous chromosomes (ii)**: This is the first step in meiosis where homologous chromosomes come together to form pairs.

2. **Crossing over between chromatids (iv)**: After the homologous chromosomes have paired, crossing over occurs. This is the process where segments of DNA are exchanged between chromatids of homologous chromosomes, increasing genetic diversity.

3. **Lining up of paired chromosomes on equator (iii)**: Following crossing over, the paired chromosomes align at the equatorial plane of the cell during metaphase.

4. **Complete separation of chromatids (i)**: Finally, during anaphase, the chromatids are pulled apart and separated to opposite poles of the cell.

Putting these steps in order, we get the following sequence:
- (ii) Pairing of homologous chromosomes
- (iv) Crossing over between chromatids
- (iii) Lining up of paired chromosomes on equator
- (i) Complete separation of chromatids

Thus, the correct sequential arrangement is: **ii → iv → iii → i**.

### Final Answer:
The correct sequential arrangement of the steps is: **(ii), (iv), (iii), (i)**.

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