Kamarajar Port (Ennore Port) was indeed the first major port in India to be registered as a company under the Companies Act. Mundra Port is widely recognized as the largest privately owned port in India. However, the Visakhapatnam Port is the largest port by volume of cargo handled and a significant container port, but Jawaharlal Nehru Port Trust (JNPT) is typically considered India's largest container port. Therefore, two of the pairs are correctly matched.