Correct Option: A

Pallavas ruled regions of northern Tamil Nadu and southern Andhra Pradesh between the second to the ninth century CE. Kanchipuram served as the capital city of the Pallava Kingdom from the 4th to the 9th century. It is also known by its former names Kanchiampathi, Conjeevaram, and the nickname “The City of Thousand Temples’. Kanchipuram was mentioned in the Mahabhasya, written by Patanjali in the 2nd century BC.