Select the most appropriate idiom for the given group of words.
A time when money might unexpectedly be needed

Correct option is A

Option (a) is the correct meaning of the given idiom.
A rainy day: A time of financial difficulty or need, when money might be required unexpectedly. (कठिन समय के लिए संचित धन)
Example: You should always save some money for a rainy day, as emergencies can arise at any time.
Other related idioms and their meanings:
· A raw deal: Unfair treatment. (अनुचित व्यवहार)
· A rash of something: A sudden increase in something unpleasant. (अचानक वृद्धि)
· A rap over the knuckles: A mild reprimand or scolding. (हल्की फटकार)