Dhrangadhra princely state was primarily located within the region known as:

Kathiawar
Halar
Sabarkantha
Mahikantha

The correct answer is Kathiawar.

Kathiawar is a region in the Indian state of Gujarat. It is located on the Kathiawar Peninsula, which is a large peninsula in the northwestern part of the state. The region is known for its many princely states, which were ruled by local rulers until India’s independence in 1947.

Dhrangadhra was one of the princely states in Kathiawar. It was ruled by the Jadeja Rajputs, who were a powerful Rajput clan. The state was founded in the 13th century by Jam Rawal, who was a descendant of the legendary Rajput hero Prithviraj Chauhan.

Dhrangadhra was a prosperous state, and its rulers were patrons of the arts and architecture. The state had a number of palaces and forts, which are still standing today. The most famous of these is the Prag Mahal, which was built in the 19th century.

Dhrangadhra was merged with the Indian Union in 1947. It is now a part of the Kutch district of Gujarat.

The other options are incorrect. Halar is a region in the Indian state of Gujarat. It is located on the Kathiawar Peninsula, to the north of Kathiawar. Sabarkantha is a region in the Indian state of Gujarat. It is located in the northern part of the state, to the east of Kathiawar. Mahikantha is a region in the Indian state of Gujarat. It is located in the central part of the state, to the south of Kathiawar.