Among the given options, Nagaland is the smallest state area-wise. Area-wise refers to the physical land area covered by a state. In this case, Nagaland has the smallest land area compared to Mizoram, Meghalaya, and Manipur.

Nagaland is located in Northeast India and is bordered by the states of Assam, Arunachal Pradesh, Manipur, and Myanmar. It covers an area of about 16,579 square kilometers. Despite its small size, Nagaland is known for its rich culture and traditions, as well as its beautiful landscapes and scenic beauty.

Mizoram, Meghalaya, and Manipur are also states located in the northeastern region of India, but they have relatively larger land areas compared to Nagaland. For example, Mizoram covers an area of about 21,081 square kilometers, Meghalaya covers an area of about 22,429 square kilometers, and Manipur covers an area of about 22,327 square kilometers.

It`s worth noting that the land area of a state can vary and change over time due to various factors such as natural processes, land reclamation, and border disputes.