Alexander Fleming found the spores of a little green mould in labs. The presence of mould prevented the growth of bacteria. From this mould, ________ was prepared.

Options

A. Streptomycin
B. Tetracyclins
C. Penicillin
D. None of above

Answer

**Step-by-Step Solution:**

1. **Identify the Key Information**: The question states that Alexander Fleming found spores of a little green mould in the lab, which prevented the growth of bacteria.

2. **Understand the Context**: The mould that Fleming discovered is known for its antibacterial properties. This means that it can inhibit or kill bacteria.

3. **Recognize the Specific Mould**: The mould in question is identified as *Penicillium notatum*. This is crucial because it is the source of the antibiotic that Fleming discovered.

4. **Determine What Was Prepared**: From the *Penicillium notatum* mould, the antibiotic that was prepared is called penicillin.

5. **Select the Correct Answer**: Based on the options provided:
- Option A: Streptomycin
- Option B: Tetracycline
- Option C: Penicillin
- Option D: None of these

The correct answer is **Option C: Penicillin**.

**Final Answer**: From this mould, **penicillin** was prepared.

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