The Television was invented by
John Logie Baird
Guglielmo Marconi
John Gutenberg
Alexander Graham Bell
One of the most important method of improving public transport is
Construction of canals
Metro railways
Construction of high ways
None of the above
Quick short messages can be sent through
Letter
Telegram
Speed post
All the above
The long distance communication was revolutionised by the invention of
Printing machine
Radio
News papers
Telephones
The communication signals are sent to other countries through
Satellites
Radio waves
E-mails
Computers
The fastest and the most convenient means of sending spoken message is
Visual communication system
