What is the new administrative capital proposed for Myanmar?

In 2005 the Myanmar government began shifting its administrative centre northward, first moving operations to Pyinmana (roughly 200 miles north of Yangon) and then establishing a newly constructed city near Pyinmana called Nay Pyi Taw (Naypyidaw), which was formally proclaimed the capital in 2006. Contemporary accounts and reference works explicitly record that the initial administrative move was to Pyinmana and that the purpose-built capital was developed adjacent to it, making Pyinmana the location associated with the proposed administrative relocation in that period [1]. Therefore, among the given options, Pyinmana is the correct choice.

Sources

1. [1] https://www.britannica.com/place/Nay-Pyi-Taw