Can sending Rama to the forest be called a sin at all?

[Shri Soumyadip mondal asked: Along with Manthara and Kaikeyi, can king Dasaratha be held as sinner in sending Rama to forest? Or it's just a choice or destiny of Rama. Can sending Rama to forest be called as a sin at all? Your servent, Soumyadip mondal]

Swami replied:- There is no sin for the souls mentioned by you because the story was already written by God for His activity to be done in His incarnation.