Which one of the following is not a mode of communication ?

Tanmay's father's office is 8 km from home. He will go by

We board and unboard an aeroplane at the :

The vehicle which runs without using petrol and hence does not pollute the air is

Which one of the following means of transportation is slowest ?

Telephone, radio, computer and television are means of

To travel in the city, we use a type of train called

Which one of the following can only run on railway tracks to go from one city to another?

My dad and  I went on a camping holiday and  travelled down the Murray river by using a

(a) Metro trains can move on any route,when the driver wants to take.
(b) A Helicopter has no wheels