General Knowledge · Scientific Discoveries
अलेक्जेंडर फ्लेमिंग द्वारा पेनिसिलिन की खोज मुख्य रूप से किसका परिणाम थी?
- 1पर्यवेक्षण के तहत की गई रासायनिक अभिक्रिया
- 2एक सैद्धांतिक परिकल्पना
- 3एक आकस्मिक अवलोकन✓
- 4एक नियोजित प्रयोग
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एक आकस्मिक अवलोकन
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