Which among the following states is not one of the "Seven Sisters" of India?

The "Seven Sisters" states of India are Assam, Arunachal Pradesh, Nagaland, Manipur, Tripura, Meghalaya and Mizoram. Sikkim is not one of the seven sisters. State Capital Chief Minister Governor Tripura Agartala Prof.(Dr.) Manik Saha Shri Satyadeo Narain Arya Sikkim Gangtok Prem Singh Tamang Ganga Prasad Assam Dispur Sarbananda Sonowal Jagdish Mukhi Meghalaya Shillong Conrad Kongkal Sangma S P Malik Mizoram Aizawl Zoramthanga P.S. Sreedharan Pill