The powerful queen Didda, who ruled in the late 10th century, ruled over:

Queen Didda was a powerful ruler of Kashmir in the late 10th century CE, who ruled first as regent and then as queen in her own right.

About Didda:

• She was born around 958 CE, the daughter of the king of Lohara (in the Pir Panjal range, near Poonch), and a granddaughter (through her mother) of the Hindu Shahi ruler Bhimadeva of Kabul.
• She married King Kshemagupta of Kashmir.
• After her husband's death in 958 CE, she ruled as regent for her young son Abhimanyu II.
• After Abhimanyu's death, she ruled as regent for her three grandsons, one after another; she is said to have had them killed when they became a threat.
• In 980 CE, she became the sole ruler of Kashmir, and ruled until her death in 1003 CE.
• She was known for her intelligence, political skill and ruthlessness; she suppressed many rebellions by nobles and ministers.
• She was assisted by her trusted minister Tunga.
• Coins were issued in her name ("Didda-kshemagupta"), showing her importance.
• She named her nephew Samgramaraja as her successor, which led to the founding of the Lohara dynasty in Kashmir (1003 CE).
• She built many temples, monasteries and towns, such as the Diddamatha.
• She is sometimes called the "Catherine the Great of Kashmir".

In popular culture:

A novel, "Didda: The Warrior Queen of Kashmir" (2020), by Ashish Kaul, popularised her story.

Women rulers in Indian history:

Prabhavati Gupta (Vakataka regent), Razia Sultan, Tarabai (Maratha regent) and Ahilyabai Holkar (Malwa).

Kashmir in early medieval times:

Kashmir was ruled by the Karkota dynasty (7th-9th centuries, including Lalitaditya Muktapida), the Utpala dynasty (9th-10th centuries, including Avantivarman), and then the dynasty of Didda's husband (the Yashaskara or Divira dynasty), followed by the Lohara dynasty.

Why not the other options?

• ✗Gujarat, Odisha and Kamarupa had their own rulers, but Didda ruled Kashmir.