Select the correct option:
`{:(,"I",,"II"),("A.","Formation of synaptonemal complex",1.,"Anaphase-II"),("B.","Duplication of centriole",2.,"Zygotene"),("C.","Action of enzyme recombinase",3.,"S-phase"),("D.","Simultaneous splitting of centromere of each chromosome",4.,"Anaphase-I"),(,,5.,"Pachytene"):}`

Options

A. A-1 B-2 C-3 D-5
B. A-2 B-3 C-4 D-1
C. A-2 B-5 C-3 D-1
D. A-2 B-3 C-5 D-1

Answer

To solve the question, we need to match the statements in Column 1 with the correct descriptions in Column 2. Let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Formation of synaptonemal complex**:
- The synaptonemal complex is a protein structure that forms between homologous chromosomes during meiosis, specifically during the **Zygotene** stage of prophase I.
- **Match**: Formation of synaptonemal complex → Zygotene (Option II, which is 2).

2. **Duplication of centriole**:
- The duplication of centrioles occurs during the **S-phase** (Synthesis phase) of the cell cycle, where DNA is replicated.
- **Match**: Duplication of centriole → S-phase (Option III, which is 3).

3. **Action of enzyme recombinase**:
- The enzyme recombinase is involved in genetic recombination and occurs during the **Pachytene** stage of prophase I when crossing over happens.
- **Match**: Action of enzyme recombinase → Pachytene (Option V, which is 5).

4. **Simultaneous splitting of centromere of each chromosome**:
- The simultaneous splitting of the centromere occurs during **Anaphase**, specifically during **Anaphase II** of meiosis when sister chromatids are pulled apart.
- **Match**: Simultaneous splitting of centromere of each chromosome → Anaphase II (Option I, which is 1).

### Summary of Matches:
- A: Formation of synaptonemal complex → Zygotene (2)
- B: Duplication of centriole → S-phase (3)
- C: Action of enzyme recombinase → Pachytene (5)
- D: Simultaneous splitting of centromere of each chromosome → Anaphase II (1)

### Final Answer:
The correct option that matches all the statements is **Option 4**.

---