(c) Odisha — Odisha was ruled by the Biju Janata Dal (BJD), which is classified by the Election Commission as a State (regional) party.
The passage explicitly names Biju Janata Dal as a regional/State party conscious of its State identity. Haryana, Madhya Pradesh, and Rajasthan have historically been ruled by national parties (BJP/INC). Odisha's BJD is the clear regional party example given in the textbook, making (c) the correct answer.