Match column I with column II and select the correct answer from the given codes.
`{:(Column I, Column II),(A."Recombinant DNA",(i)"Chilled ethanol"),(B."Precipitation of DNA",(ii)DNA "staining"),(C."Transposons",(iii)"Jumping genes"),(D."Ethidium bromide",(iv)"Genetic engineering"):}`
1) A − ( i v ) , B − ( i ) , C − ( i i i ) , D − ( i i )
2) A − ( i ) , B − ( i i i ) , C − ( i i ) , D − ( i v )
3) A − ( i i ) , B − ( i ) , C − ( i i i ) , D − ( i v )
4) A − ( i v ) , B − ( i i ) , C − ( i ) , D − ( i i i )

Options

A. 1) `A-(iv),B-(i),C-(iii),D-(ii)`
B. 2) `A-(i),B-(iii),C-(ii),D-(iv)`
C. 3) `A-(ii),B-(i),C-(iii),D-(iv)`
D. 4) `A-(iv),B-(ii),C-(i),D-(iii)`

Answer

To solve the question of matching Column I with Column II, we will analyze each item in Column I and find its corresponding match in Column II step by step.

### Step-by-Step Solution:

1. **Identify A: "Recombinant DNA"**
- Recombinant DNA is DNA that has been formed artificially by combining constituents from different organisms. It is primarily used in genetic engineering.
- **Match:** (iv) "Genetic engineering"

2. **Identify B: "Precipitation of DNA"**
- The precipitation of DNA is commonly achieved using chilled ethanol, which helps in isolating DNA from a solution.
- **Match:** (i) "Chilled ethanol"

3. **Identify C: "Transposons"**
- Transposons are segments of DNA that can move around to different positions within the genome of a single cell. They are often referred to as "jumping genes."
- **Match:** (iii) "Jumping genes"

4. **Identify D: "Ethidium bromide"**
- Ethidium bromide is a chemical used in molecular biology to stain nucleic acids, allowing for visualization of DNA under UV light.
- **Match:** (ii) "DNA staining"

### Final Matching:
- A matches with (iv)
- B matches with (i)
- C matches with (iii)
- D matches with (ii)

### Summary of Matches:
- A - (iv)
- B - (i)
- C - (iii)
- D - (ii)

### Correct Code:
The correct answer based on the matches is:
1) A - (iv), B - (i), C - (iii), D - (ii)

Thus, the correct option is **1)**.

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