Which of the following causes wheat rust disease?

Options

A. A red Alga
B. A green Alga
C. A fungus
D. Mycoplasma

Answer

To determine which organism causes wheat rust disease, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Red Algae
- B) Green Algae
- C) Fungus
- D) Mycoplasma

2. **Evaluate Option A - Red Algae**:
- Red algae are known to cause arsenic poisoning, not wheat rust disease. Therefore, this option is incorrect.

3. **Evaluate Option B - Green Algae**:
- Green algae do not cause any diseases in plants or animals. Hence, this option is also incorrect.

4. **Evaluate Option D - Mycoplasma**:
- Mycoplasma is a type of bacteria that is known to cause diseases such as pneumonia in humans. It does not cause wheat rust disease. Thus, this option is incorrect as well.

5. **Evaluate Option C - Fungus**:
- Fungi are known to cause various plant diseases, including wheat rust disease. The specific fungus responsible for wheat rust disease is *Puccinia triticina*. Therefore, this option is correct.

6. **Conclusion**:
- The correct answer to the question "Which of the following causes wheat rust disease?" is **Option C: Fungus**.

### Final Answer:
**C) Fungus** (specifically *Puccinia triticina*).

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