Here's another Pareto Optimality question, just for practice. Imagine consumer A has a utility function $U=x$ and consumer $B$ has a utility function $U=$min$(x,y).$ Right now both consumers have $10$ units of $x$ and $10$ units of $y.$ is this Pareto optimal?

Yes

No$,$ Consumer A should give their $x$ to consumer B

No$,$ Consumer A should give their $y$ to consumer B

No$,$ Consumer B should give their $x$ to consumer A

No$,$ Consumer B should give their y to consumer A