Question 3 of 10
Where was the first electric toothbrush patented?
A: Austria
ERROR
Correct Answer: The first electric toothbrush was patented in Switzerland after World War II. She worked on electricity.
B: Germany
ERROR
Correct Answer: The first electric toothbrush was patented in Switzerland after World War II. She worked on electricity.
C: Switzerland
RIGHT
Explanation: The first electric toothbrush was patented in Switzerland after World War II. She worked on electricity.
D: Japan
ERROR
Correct Answer: The first electric toothbrush was patented in Switzerland after World War II. She worked on electricity.