Micelle formation by soap in aqueous solution is not possible at all temperatures. Micelles formation occurs only above a particular temperature known as Kraft temperature (T_K). So (i) is wrong.

Micelles formation occurs only above critical micelle concentration (CMC). So (ii) is correct.

On dilution, the intermolecular force of attraction between the soap particles decreases and soap solution micelles get converted to their respective ions. So (iii) is also correct.

Soap solution at low concentration behaves like normal electrolytic solution. But at high concentration soap solution behaves as associated colloid and form micelles. So option (iv) is wrong.