The correct answer is Sikkim . ● The seven sisters states of India from north to south are Arunachal Pradesh, Assam, Meghalaya, Nagaland, Manipur, Tripura, and Mizoram. ● Sikkim belongs to the group of northeastern states but doesn't belong to Seven Sisters State. ◦ Sikkim also called the only brother of seven sisters states . ● The total area of seven sisters state is 2,55,511 sq km. ● It is 7% of the total area of India's area. ● The total Population of Seven sisters state as per the 2011 census is 44.98 million which is roughly 3.7% of India's total population. ● The term "Land of seven sisters" was coined by Jyoti Prasad Saika in 1972 .