Transpor and communications S. St

The different vehicles that we use for travelling are known as (a)  

Aeroplane s land and take off from (a)  

Radio was invented by (a)  

(a)   have become common for reading books.

We can make calls within an office or a building through an (a)  

Which means of communications is useful during time of emergency for giving warnings about floods and cyclones (a)  

Which machine is used in offices for sending written message or photographs instantly via telephone lines (a)  

Which is the fastest and the most expensive means of transportation (a)  

Which vehicle is useful in times of emergency (a)  

Who handles the postal services of India (a)