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: Invention
इलेक्ट्रॉन सूक्ष्मदर्शी की खोज किसने की थी? , Who invented the electron microscope?
Who invented the electron microscope?
A.
Deep and short
गरहन और शॉर्ट
B.
Knoll and Ruska
नॉल और रुस्का
C.
Farmer and Moore
फारमर और मूर
D.
johnson and johnson
जान्सीन और जान्सीन
Solution
B. Knoll and Ruska
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