The correct answer is: a) Moirang.
The Angom dynasty was a royal family that ruled the Moirang principality in Manipur from the 13th to the 18th centuries. The dynasty was founded by Angom Ningthou Khaba, who is said to have descended from the sun god. The Angoms were a powerful and influential dynasty, and they played a major role in the history of Manipur.
The Angom dynasty was overthrown in the 18th century by the Meitei dynasty, but the Angoms continue to play an important role in Manipuri society. The Angoms are a proud and noble people, and they are known for their bravery and their loyalty to their family and their kingdom.
The other options are incorrect because they are not former princely states in Manipur. Moirang is a town in Manipur, and Andro, Wangkhei, and Nongmaiching are villages in Manipur.