An important early historical kingdom in Manipur that finds mention in ancient texts is:

Cheitharol Kumbaba
Panthoibi
Kangleipak
Nongda Lairen Pakhangba

The correct answer is: c) Kangleipak.

Kangleipak was an early historical kingdom in Manipur that finds mention in ancient texts. It was founded by Nongda Lairen Pakhangba, who is considered to be the first king of Manipur. Kangleipak was a powerful kingdom that ruled over much of the present-day state of Manipur. It was a major center of trade and commerce, and its people were known for their skills in warfare and agriculture. Kangleipak was eventually conquered by the British in the 19th century, but its legacy continues to this day.

Cheitharol Kumbaba is a chronicle of the kings of Manipur. It was written in the 18th century, and it contains a wealth of information about the history of the kingdom. Panthoibi is a goddess who is worshipped in Manipur. She is the consort of Nongda Lairen Pakhangba, and she is said to have helped him to found the kingdom of Kangleipak. Nongda Lairen Pakhangba is the first king of Manipur. He is said to have been born from a stone, and he is credited with founding the kingdom of Kangleipak.

I hope this helps!