Select the most appropriate meaning of the given idiom.
Burn the midnight oil

Correct option is D

Option (d) is the correct meaning of the given idiom.
Burn the midnight oil: To work very late into the night, especially studying or working hard. (देर रात तक काम करना)
Example: I had to burn the midnight oil to prepare for the final exam.
Other related idioms:
· Hit the books – to begin studying seriously.
· Keep one’s nose to the grindstone – to work hard for long periods.
· Put in long hours – to work for a long time.