The correct answer is option 4, Karikala. Karikala was a Chola king who founded the city of Puhar. Puhar, also known as Kaveripattinam, was an ancient port city located on the east coast of Tamil Nadu, India. It served as an important center for trade and maritime activities during the time of the Cholas. Karikala, who ruled during the Sangam period, played a significant role in expanding the Chola empire and establishing Puhar as a prominent city. His reign was characterized by various conquests and infrastructure development, including the construction of irrigation canals and temples. Puhar continued to flourish as the capital of the Cholas until it was eventually abandoned due to natural disasters and the shifting of trade routes.