Select the most appropriate idiom for the highlighted words in the given sentence.
The childhood days are peaceful days of our life.

Correct option is A

Option (a) is the correct idiomatic expression.
Halcyon days: A time in the past that was idyllically happy and peaceful. (शांतिपूर्ण और सुखद दिन)
Example: I often think of my school days as the halcyon days of my life.
Other related idioms:
· Golden days – Best and happiest period.
· Salad days – Period of youthful inexperience and idealism.
· Days of yore – Times long past.