A) Tivadar Puskas
B) Joseph Priestley
C) Petrache Poenaru
D) James Leonard Plimpton
Correct Answer: A
Solution :
The first to propose a telephone exchange was Hungarian Tivadar Puskas, a Hungarian telephone pioneer, in 1877 while he was working for Thomas Edison. The first experimental telephone exchange was based on the ideas of Puskas, and it was built by the Bell Telephone Company in Boston in 1877. Puskas is considered as the inventor of the telephone exchange.
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