The last option all of these answer choices relate to an electrolyte
Step-by-step explanation:
Acids and bases which are strong but not weak are said to be strong electrolyte.
In salts, ionic salts which are soluble are called strong electrolyte.
KOH completely dissociates when added to solvent such as water and forms its dissociated ions - K+ and OH- which gets soluble in water and becomes standardized.
The ability to conduct electricity in solution occurs when the salt or ionizable molecules dissolved, its dissociated ions can move freely in solution, allowing a charge to flow.
Therefore according to the data above all the answer choices relate to an electrolyte.