ऑप्टिकल फाइबर का आविष्कार – McqOptions

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1.	ऑप्टिकल फाइबर का आविष्कार किसने किया -
A.	सैमुअल कोहेन
B.	टी.एच.मइमाह
C.	पसी.एल.स्पेंसर
D.	नरिंदर कपानी
Answer» E.

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