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. Entropy is the degree of disorderliness in a system. Among the phases, solid has the most ordered structure. Therefore, the lowest entropy. The least ordered is the gas phase which represents the highest entropy. Therefore, the correct answer is option D, steam. 

Answer: Option (D) is the correct answer.

Explanation:

As it is known that entropy is the measure of randomness present within the molecules of a substance. Hence, more is the motion of particles of a substance more will be the collisions between them.

As a result, greater will be the entropy then.

Also, more is the temperature of a substance or heat provided to a substance then it means that more will be its degree of randomness.

So, in steam molecules will have high kinetic energy. Hence, it will have the highest entropy.

Thus, we can conclude that out of the given options steam has the highest entropy.