Select the most appropriate meaning of the given idiom:
A bolt from the blue

Correct option is A

Idiom Meaning: A bolt from the blue refers to a sudden and surprising event, usually unpleasant.
Example: The news of his resignation was a bolt from the blue.
Meanings of Options:
· A sudden and unexpected event – Correct
· Raining heavily – idiom: raining cats and dogs.
· Thunder and rain in a storm – literal, not idiomatic.
· A spontaneous but expected event – contradictory.