Assertion:. All forms of transport are also referred to as lines of communication. Reasoning: The invention of writing preserved messages and helped to make communication dependent on means of transport and the messages were actually carried by hand, animals, boat, road, rail and air

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A. Both Assertion (A) and reasoning (R) are correct and but R is not the correct explanation of A. Assertion (A) is true but Reasoning (R) is not correct. Assertion (A) is not true but Reasoning (R) is correct.

Both Assertion (A) and reasoning (R) are correct and R is the correct explanation of A.

The invention of writing preserved messages and helped to make communication dependent on means of transport. These were actually carried by hand, animals, boat, road, rail and air. That is why all forms of transport are also referred to as lines of communication.