What do we affix on letters?
Gum
Sticker
Name slip
Which is the cheapest means of postal communication?
Inland letter
Post card
Aerogramme
Envelope
What is an important part of communication media?
Books
Radio
Mobile phones
Television
Which was the first device to send messages by electricity?
News paper
Telegram
TV
What helps us to send letters to all places?
Post office
Police station
School
