railway RRB Technician Grade 3 Mock Test 2024 General Science Biology Invention and Discoveries

पहला पृथक एंटीबायोटिक कौन सा था?

1
टेरामाइसिन
2
पेनिसिलिन
3
स्ट्रेप्टोमाइसिन
4
निओमाइसिन
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