The Gahadavalas ruled over which region of India?

Correct option is C

The Gahadavalas primarily ruled over the region of Kanauj in India. So the correct answer is (c) Kanauj
The Gahadavalas were a medieval Indian dynasty that rose to prominence in the 11th century. They are notably associated with the region of Kanauj in the present-day Indian state of Uttar Pradesh. The dynasty's influence spanned several centuries, from around the late 11th century to the 12th century.
The most famous ruler of the Gahadavala dynasty was Govindachandra, who reigned from around 1114 to 1155 CE. He is noted for his administrative reforms, his patronage of Hindu religion and culture, and for maintaining the prosperity of Kanauj as a key urban center. His reign marked a period of stability and growth in arts and education in the region.