Option d is the correct answer. The river that was the lifeline of the Pandya state is the Vengi River. Important Tips The Vengi, also known as the Vaigai, is a river that flows through the Madurai and Sivanthe districts of Tamil Nadu. The Vengi was the main source of water, irrigation, and transportation for the Pandyas, who ruled over the southern tip of India from the 6th century BCE to the 16th century CE. The Vengi was also associated with the religious and cultural life of the Pandyas, as it was considered sacred by the Hindus and Buddhists. The Vengi witnessed many historical events and legends, such as the coronation of the Pandya kings, the marriage of Meenakshi and Sundareswarar, and the visit of Agastya.