In the question of which region recently became the first to successfully provide 100% functional household tap connections in rural areas, the correct answer is Goa.
Goa achieved this milestone under the Government of India's Jal Jeevan Mission, a program aimed at ensuring potable water to all rural households by 2024. It became the first state in the country to provide tap water connections to each rural household, a significant step towards improving the quality of life and health in rural communities.
This accomplishment demonstrates Goa's efficient implementation and commitment to infrastructural development and resource management, setting an example for other states to follow.