What is a 'Teletext'?

Options :
  1. It is the flashing of telephone conversation on TV screen.
  2. It is flashing the text of the message on the telex machine.
  3. It is connecting the local telephones with outstation telephones without code numbers.
  4. It is flashing of the text of news and information on the TV screen.
Answer and Explanation :-

Answer: Option 4


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