state gov RSMSSB Livestock Assistant Mock Test Series 2025 General Science Biology Invention and Discoveries

देवीची लस कोणी विकसित केली?

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रॉबर्ट कोच
2
लुई पाश्चर
3
अलेक्झांडर फ्लेमिंग
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एडवर्ड जेनर
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