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रेडियोधर्मिता की खोज किसने की थी? , Who discovered radioactivity?
Who discovered radioactivity?
A.
rutherford
रदरफोर्ड
B.
Henry Bequerel
हेनरी बेक्वेरेल
C.
roentgen
रोएंटजेन
D.
Einstein
आइंस्टाइन
Solution
B. Henry Bequerel
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