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Ram Sharma • 188.81K Points
Coach Science

Q. पोलियो के टिके के खोज किसने की ?

(A) जे.जे.थॉमसन
(B) जेड.जॉनसेन
(C) जॉन.ई.साल्क
(D) जॉन हैरिसन
Correct Answer - Option (C)

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