`{:(,,"Colum I","Column II"),(,I,"Statins","A. Yeast"),(,II,"Ethanol","B. Blood-chlesterol lowering agent"),(,III,"Dung","C. Insect-resistant plant"),(,IV,"Bt-cotton","D-Biogas"):}`
Which of the combinations is correct?

Options

A. I-B, II-A, III-D, IV-C
B. I-C, II-D, III-A, IV-B
C. I-A, II-B, III-C, IV-D
D. I-D, II-B, III-A, IV-C

Answer

To solve the question, we need to match the items in Column I with their correct descriptions in Column II. Let's analyze each item step by step:

### Step 1: Identify the first item - Statins
- **Statins** are known as blood cholesterol-lowering agents. They are medications used to lower cholesterol levels in the blood.
- **Match**: Statins → B (Blood-cholesterol lowering agent)

### Step 2: Identify the second item - Ethanol
- **Ethanol** is a type of alcohol that is produced through fermentation, primarily by yeast. It is commonly found in alcoholic beverages.
- **Match**: Ethanol → A (Yeast)

### Step 3: Identify the third item - Dung
- **Dung** is organic matter that contains a variety of microbes. These microbes can be used to produce biogas through anaerobic digestion.
- **Match**: Dung → D (Biogas)

### Step 4: Identify the fourth item - Bt-cotton
- **Bt-cotton** is a genetically modified organism (GMO) that has been engineered to be resistant to certain pests. It is used in agriculture to reduce the need for chemical insecticides.
- **Match**: Bt-cotton → C (Insect-resistant plant)

### Summary of Matches:
- I: Statins → B (Blood-cholesterol lowering agent)
- II: Ethanol → A (Yeast)
- III: Dung → D (Biogas)
- IV: Bt-cotton → C (Insect-resistant plant)

### Final Answer:
The correct combinations are:
- I - B
- II - A
- III - D
- IV - C