For an isolated system, $\Delta U=0$, what will be $\Delta S$?

Q.

For an isolated system, ΔU = 0, what will be ΔS?

Q. For an isolated system ∆U = 0 is equal to zero then,

A) ∆S = 0
B) ∆S > 0
C) ∆S < 0
D) the value of ∆S cannot be predicted
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What would be the answer of this question and why?

Q. For an isolated system $△$ U=0 what will be $△$S?

Q. For a phase change
$H_{2}O\left(l\right)\stackrel{0{}^{\circ }C,1bar}{\rightleftharpoons }{H}_{2}O\left(s\right)$

Q. Which of the following may no be conserved for an isolated system