Which Indian state has signed a historic sister-state agreement with South Australia?

Rajasthan
South Australia has signed a historic sister-state agreement with Rajasthan state. The agreement would pave new ways to boost investment and export opportunities between the two states. The agreement is based on a two-way exchange of research, policy and technical capabilities. The expertise within South Australia in sustainable water management will help to further improve water access and security for businesses and communities in Rajasthan.