railway RRB JE (CBT I + CBT II) Mock Test 2024 General Science Biology Human body

खालीलपैकी कोणी देवीची लस शोधली होती?

1
अ‍ॅरिस्टॉटल
2
बॅरी मार्शल
3
रॉबिन वॉरेन
4
एडवर्ड जेन्नर
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