An example for hydrophobic sol among the following is

Step-by-step solution

Arsenic sulphide solution ( ( As ₂ ~S ₃ ~S ²⁻ ) ) is a hydrophobic solution i.e. it has poor or zero affinity towards dispersion medium ( ( H ₂ O ) ). Whereas, solution of gum, starch and protein are individually hydrophilic in nature as they are natural polymers (dispersed phase).