Answer: The correct answer is option 3.
Explanation: The phase change from solid to liquid occurs when the substance is at a constant temperature. That temperature is known as the melting point of that substance.
[tex]Solid\rightleftharpoons Liquid[/tex]
We are asked the temperature at which Lead changes from solid to liquid. As, the melting point of lead is 328°C, so this is the temperature at which Lead changes from solid to liquid.
Hence, the correct option is 3.