How many of the following are the lyophilic sols? Gold sol, Silver sol, geltin,, starch,gum, Fe(OH)_(3),As_(2)S_(3)

How many of the following are the lyophilic sols? Gold sol, Silver so

1.	How many of the following are the lyophilic sols? Gold sol, Silver sol, geltin,, starch,gum, Fe(OH)_(3),As_(2)S_(3)
Answer» ANSWER :A-3(GUM,STARCH,GELATIN)