1870 मे कैथोड किरणों की खोज कि – McqOptions

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1.	1870 मे कैथोड किरणों की खोज किसने करी ?
A.	ब्लेजी पास्कल
B.	नील बोर
C.	विलियम क्रुक्स
D.	टॉलमी
Answer» D. टॉलमी

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