The correct answer is: a) Saubhagya Scheme.
The Saubhagya Scheme is a government scheme launched in 2015 to provide electricity to all rural households in India. The scheme has been successful in providing electricity to over 200 million rural households, including those in Arunachal Pradesh.
The Jal Jeevan Mission is a government scheme launched in 2019 to provide piped water to all rural households in India. The scheme is still under implementation, but it has already made significant progress in providing water to rural households in Arunachal Pradesh.
The Swachh Bharat Mission is a government scheme launched in 2014 to improve sanitation in India. The scheme has been successful in constructing toilets in millions of households, including those in Arunachal Pradesh. However, the scheme has not been able to address the issue of open defecation in rural areas.
The Pradhan Mantri Awas Yojana-Gramin is a government scheme launched in 2015 to provide housing to the poor in rural areas. The scheme has been successful in providing housing to millions of families, including those in Arunachal Pradesh. However, the scheme has not been able to address the issue of homelessness in rural areas.
In conclusion, the Saubhagya Scheme is the most appropriate answer to the question as it is a government scheme specifically designed to provide basic amenities like electricity, water, and sanitation to rural households in Arunachal Pradesh.