Question Detail
Question
According to the 'Summary of key milestones', in which decade were the first pacemakers invented?
Correct Answer
Option C is the correct answer.
Detailed Explanation
The 'Summary of key milestones' lists '1950s: Prosthetics and artificial organs' and the preceding text mentions '1955-Pacemaker: First pacemakers were invented'.
Hint
Look for the specific decade associated with the invention of the pacemaker in the historical timeline.