Micelles are $....$.

How many of the following are true solutions?
$I :$ Urea solution,
$II :$ Gelatin,
$III :$ Glucose solution,
$IV :$ $NaCl$ solution,
$V :$ Butter,
$VI :$ Blood

Gold numbers of some colloids are: Gelatin $0.005-0.01$,Gum arabic: $0.15-0.25$; Oleate: $0.04-1.0$; Starch: $15-25$. Which among these is a better protective colloid?

Which one of the following statements is not correct?

Given below are two statements ($S-I$ and $S-II$):
$S-I$: Scattering of light by dispersed particles of a colloidal system is known as the Tyndall effect.
$S-II$: The diameter of the dispersed particles should not be much smaller than the wavelength of the light used.
Choose the most appropriate answer from the options given below.

Which of the following electrolytes would be most effective in the coagulation of Arsenic sulphide sol?