Question

In which of the following pairs was the second development dependent on the first development?

A. Invention of internal combustion engine; English railroad boom
B. Introduction of assembly line ;invention of automobile
C. Development of Bessemer process ; construction of first iron bridge
D. Invention of dynamo sending of first telegraph msg

Answer 1

Answer: D

Step-by-step explanation:

The dynamo sent the first telegraph message

Answer 2

D. Invention of the dynamo sending of first telegraph message