Mathc column I with column II and select the correct option from the given codes.
`{:(,"ColumnI","Column II"),((A),"Chief producers in oceans",(i)"Euglenoids"),((B),"Red tides",(ii)"Diatoms"),((C),"Mixotrophic nutrition",(iii)"Slime moulds"),((D),"Plasmodium",(iv)"Dinoflagellates"):}`

Options

A. A-ii,B-iv,C-i,D-iii
B. A-ii,B-iv,C-iii,D-i
C. A-ii,B-iii,C-i,D-iv
D. A-i,B-iv-C-iii,D-ii

Answer

To solve the matching question between Column I and Column II, we will analyze each item in Column I and find the corresponding item in Column II based on biological classification.

### Step-by-Step Solution:

1. **Identify Chief Producers in Oceans (A)**:
- The chief producers in oceans are primarily phytoplankton. The two main types of phytoplankton are **Diatoms** and **Dinoflagellates**. Diatoms are well-known for their role as primary producers in marine ecosystems.
- **Match**: A → (ii) Diatoms

2. **Identify Red Tides (B)**:
- Red tides are caused by the rapid growth of certain types of phytoplankton, particularly **Dinoflagellates**. These organisms can produce toxins that lead to harmful algal blooms, known as red tides.
- **Match**: B → (iv) Dinoflagellates

3. **Identify Mixotrophic Nutrition (C)**:
- Organisms that exhibit mixotrophic nutrition can be both autotrophic (producing their own food) and heterotrophic (consuming other organisms). **Euglenoids** are a prime example of mixotrophic organisms, as they can photosynthesize and also absorb nutrients from their environment.
- **Match**: C → (i) Euglenoids

4. **Identify Plasmodium (D)**:
- Plasmodium is a genus of parasitic protozoa known for causing malaria in humans. It is not related to slime molds, but rather is a distinct group of organisms. However, slime molds are often studied in a similar context of cellular organization and life cycles.
- **Match**: D → (iii) Slime moulds

### Final Matches:
- A → (ii) Diatoms
- B → (iv) Dinoflagellates
- C → (i) Euglenoids
- D → (iii) Slime moulds

### Correct Option:
The correct matching is:
- A - (ii)
- B - (iv)
- C - (i)
- D - (iii)