Prime Minister Narendra Modi inaugurated a 216-ft statue of 11th century saint Ramanujacharya in Hyderabad. The statue is made up of 'panchaloha', a combination of five metals. Which of the following is not the one of the metals of panchaloha?

Prime Minister Narendra Modi inaugurated a 216-ft statue of Ramanujacharya in Hyderabad and highlighted the 11th century saint’s message of equality of all. The ‘Statue of Equality’ commemorates Ramanujacharya who promoted the idea of equality in all aspects of living, including faith, caste and creed. While the statue was conceptualized by Sri Chinna Jeeyar Swami of Sri Ramanujacharya Ashram, it is made up of 'panchaloha', a combination of five metals including gold, silver, copper, bronze and zinc and is one of the tallest metallic statues in sitting positions in the world.