Answer:
Option A is correct. △S> 0
Explanations:
What is entropy?
Entropy is defined as the degree of disorderliness or randomness of a reaction. For the icicle, if it melts at 2 degree celsius, it will change its state to liquid.
The entropy of a system changes with increase in its disorderliness and since liquid has a greater form of disorderliness than solid, hence the change in entropy when the icicle melts at 2°C will increase i.e △S > 0