railway RRB Technician Grade 3 Mock Test 2024 General Science Biology Human body

कोणत्या प्रकारची लस घटसर्पापासून संरक्षण करते?

1
जिवंत-क्षीण
2
वायरल वेक्टर
3
टॉक्सॉइड
4
mRNA
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