match the following columns and choose the correct option w.r.t. hydrarch succession. a. submerged plant stage (column I) and (i) hydrilla (column II), b. scrub stage (column I), (ii) phytoplanktons ( column II), c. Pioneer community (column I), (iii) juncas(column II), d. Marsh meadow stage (column I), (iv) Salix (column II)

Options

A. a(i), b(iv), c(ii), d(iii)
B. a(i), b(ii), c(iv), d(iii)
C. a(i), b(iii), c(iv), d(ii)
D. a(ii), b(iv), c(i), d(iii)

Answer

To solve the question of matching the columns with respect to hydrarch succession, we will analyze each stage and its corresponding example step by step.

### Step-by-Step Solution:

1. **Submerged Plant Stage**:
- In hydrarch succession, the submerged plant stage is characterized by the presence of aquatic plants that grow under water.
- The correct example for this stage is **Hydrilla**.
- **Match**: a → (i)

2. **Scrub Stage**:
- The scrub stage is characterized by the growth of shrubs and small trees.
- The correct example for this stage is **Salix**, which is a genus of willow trees.
- **Match**: b → (iv)

3. **Pioneer Community**:
- The pioneer community is the first group of organisms to colonize a barren or disturbed area.
- In the context of hydrarch succession, the pioneer community is represented by **Phytoplanktons**, which are the first organisms to establish in aquatic environments.
- **Match**: c → (ii)

4. **Marsh Meadow Stage**:
- The marsh meadow stage is characterized by the presence of herbaceous plants in wetland areas.
- The correct example for this stage is **Juncus**, which is a genus of rushes commonly found in marshy areas.
- **Match**: d → (iii)

### Final Matches:
- a → (i) Hydrilla
- b → (iv) Salix
- c → (ii) Phytoplanktons
- d → (iii) Juncus

### Conclusion:
The correct matches are:
- a → (i)
- b → (iv)
- c → (ii)
- d → (iii)

Thus, the correct option is the first one.