NAWALPARASI: Nepali Congress General Secretary Shashank Koirala today highlighted the need of collaboration among all the political parties for sustainable peace, prosperity and full implementation of the constitution.

Speaking at the tea reception organised in Nawalparasi today, Koirala said the political achievements could not be institutionalised in the country as the Nepali Congress did not become the decisive force.

He also urged to lend their support to make the NC the largest party in the upcoming House of Representatives and State Assembly elections.