Select the incorrect match.

Options

A. `{:("Algae","Use"),("Gelidium","Preparation of ice - creams and jellies"):}`
B. `{:("Algae","Use"),("Spirullina","Used as food suppliments by space travelers"):}`
C. `{:("Algae","Use"),("Chlorella","Used in cough syrups"):}`
D. `{:("Algae","Use"),("Brown algae","As emulsifying agent"):}`

Answer

To solve the question of selecting the incorrect match among the given options related to algae and their uses, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the First Option: Gelidium**
- **Type of Algae**: Gelidium is a type of red algae belonging to the Rhodophyceae family.
- **Use**: It is used in the preparation of ice creams and jellies.
- **Conclusion**: This is a correct match.

2. **Identify the Second Option: Spirulina**
- **Type of Algae**: Spirulina is a blue-green algae (cyanobacteria).
- **Use**: It is rich in proteins and is used as a food supplement, notably by space travelers.
- **Conclusion**: This is also a correct match.

3. **Identify the Third Option: Chlorella**
- **Type of Algae**: Chlorella is a green algae.
- **Use**: It is often used to prevent cancer and reduce side effects of radiation treatment, and it helps stimulate the immune system.
- **Conclusion**: The statement that it is used in cough syrups is incorrect. Therefore, this is the incorrect match.

4. **Identify the Fourth Option: Brown Algae**
- **Type of Algae**: Brown algae belong to the Phaeophyceae family.
- **Use**: They are used as emulsifying agents and supplements.
- **Conclusion**: This is a correct match.

### Final Conclusion:
The incorrect match is the third option: Chlorella, as it is not used in cough syrups but rather for cancer prevention and immune system support.

### Answer:
The incorrect match is **Chlorella used in cough syrups**.

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