Q. Radios work . . . . . . . . electricity.
✅ Correct Answer: (B)
by
Explanation: The most appropriate preposition in this blank will be 'by'. Here the meaning of 'by' is 'through the means of'.
Explanation by: Team MCQ Buddy
The most appropriate preposition in this blank will be 'by'. Here the meaning of 'by' is 'through the means of'.