Consider the following pairs:

State – Description
I. Arunachal Pradesh : The capital is named after a fort, and the State has two National Parks.
II. Nagaland : The State came into existence on the basis of a Constitutional Amendment Act.
III. Tripura : Initially a Part 'C' State, it became a centrally administered territory with the reorganization of States in 1956 and later attained the status of a full-fledged State.

How many of the above pairs are correctly matched?