`{:(,,"Column I","Column II"),(,I,"Fermentors","A. Baker's yeast"),(,II,"Bread","B. Large vessels for growing microbes"),(,III, "Aerobic microbes","C. Ministry of Environment and Forest"),(,IV,"Ganga Action Plan","D. Flocs"):}`
Which of the combinations is correct?

Options

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

Answer

To solve the question, we need to match the items in Column I with the correct items in Column II based on their definitions and functions.

### Step-by-Step Solution:

1. **Identify Fermentors**:
- Fermentors are large vessels used for growing microbes, particularly in the production of alcoholic beverages.
- Therefore, Fermentors (I) match with **B. Large vessels for growing microbes**.

2. **Identify Bread**:
- Bread is primarily made using Baker's yeast, which is a type of yeast used in the fermentation process to make bread rise.
- Thus, Bread (II) matches with **A. Baker's yeast**.

3. **Identify Aerobic Microbes**:
- Aerobic microbes require oxygen for their survival and growth. However, the question seems to refer to anaerobic microbes, which do not require oxygen and are often found in flocs.
- Therefore, Aerobic microbes (III) do not match with any option provided, but if we consider anaerobic microbes, they match with **D. Flocs**.

4. **Identify Ganga Action Plan**:
- The Ganga Action Plan is an initiative by the Ministry of Environment and Forest aimed at cleaning and conserving the Ganga River.
- Hence, Ganga Action Plan (IV) matches with **C. Ministry of Environment and Forest**.

### Summary of Matches:
- I (Fermentors) → B (Large vessels for growing microbes)
- II (Bread) → A (Baker's yeast)
- III (Aerobic microbes) → D (Flocs)
- IV (Ganga Action Plan) → C (Ministry of Environment and Forest)

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

The correct option that matches all these combinations is **Option 4**.