पॉल निपको, जॉन बेयर्ड और चा� – McqOptions

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1.	पॉल निपको, जॉन बेयर्ड और चार्ल्स जेनकिंस ने किस प्रकार की प्रणाली का आविष्कार किया?
A.	टेलीफोन
B.	पूर्व चेतावनी
C.	बिजली
D.	टेलीविजन
Answer» E.

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