Which of the following metal combination is/are selected as per given requirement in the figure?

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Which of the following metal combination is/are selected as per given requirement in the figure? <img src=https://i.ibb.co/c1cnC5W/15.png" data-src="https://i.ibb.co/c1cnC5W/15.png" data-width="1024" data-height="1024" alt="15" border="0" />"