The communication signals are sent to other countries through
Satellites
Radio waves
E-mails
Computers
The inventor of radio is
Guglielmo Marconi
Johann Gutenberg
J.C Bose
Lohn Logie Baird
Quick short messages can be sent through
Letter
Telegram
Speed post
All the above
One of the most important method of improving public transport is
Construction of canals
Metro railways
Construction of high ways
None of the above
The printing machine was invented in the year
1223
1333
1443
1553
Find the odd one.
Aeroplane
Car
Taxi
Train