Easy
A few substances are arranged in the increasing order of 'forces of attraction' between their particles. Which one of the following represents a correct arrangement?
Intermolecular forces of attraction increase in the order gas < liquid < solid. Oxygen (gas) has the weakest, water (liquid) has intermediate, and sugar (solid) has the strongest force of attraction among particles, matching this increasing order.
Re-check your working by substituting the answer back into the original question.