The most appropriate method of making egg-albumin sol is :

Question

$\begin{array}{1 1}\text{(1)Break an egg carefully and transfer the transparent part of the content to 100 mL of 5% w/V saline solution and stir well.} \\ \text{(2)Break an egg carefully and transfer only the yellow part of the content to 100 mL of 5% w/V saline solution and stir well.} \\ \text{(3)Keep the egg in boiling water for 10 minutes. After removing the shell, transfer the white part of the content to 100 mL of 5% w/V saline solution and homogenize with a mechanical shaker.} \\ \text{(4)Keep the egg in boiling water for 10 minutes. After removing the shell,transfer the yellow part of the content to 100 mL of 5% w/V saline solution and homogenize with a mechanical shaker.}\end{array}$