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Nats5antidams
Nats5antidams Nats5antidams
  • 22-12-2016
  • Physics
Answered

Which of the following does not use electricity or radio waves to communicate?

A.Radio

B.Telephone

C.Pony Express

D.Telegraph

Verified Answer :

Erudite1
Erudite1 Erudite1
  • 22-12-2016

All the devices listed above use waves except pony express. Therefore the answer is C.

Answer Link

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