Question

Which of the following did NOT appear first in the 1800s? The telephone. The telegraph. Steam powered passenger trains. Steel. cargo airplanes.

Answer 1

Ans) Steel ( Chinese of warring states period 403-221 BC had quench steel, but the steel was created by melting together of wrought iron and cast iron around 202 BC-220 AD)

while the Cargo airplanes was made in 1911 which were not designed primarily as cargo carriers, it is just used only to carry mails.