What is the main basis difference between distillation and separating funnel?

Correct answer: Distillation uses boiling-point difference and a separating funnel uses immiscibility

Distillation separates liquids by exploiting a difference in their boiling points. On heating, the more volatile component vaporises first, and the vapour is then cooled and condensed into a separate receiver. A separating funnel, in contrast, is used for immiscible liquids that form distinct layers because they do not mix; the layers are released separately through the stopcock according to density. Therefore option A correctly states the different bases. Neither method depends on magnetism, and neither is restricted to solids. Filter paper is not an essential part of either method. The governing distinction is volatility and boiling point for distillation versus immiscibility and layer formation for a separating funnel.