We can make a few deductions thanks to the local rule.
First, M and P must be the boys assigned to lockers 1 and 2. We can’t assign J, because J always shares. And we can’t assign F, because F is already assigned to locker 3.
Second, F must share a locker, because two of the boys must always share.
Third, J must be assigned to locker 5, because the shared lockers can’t be beside each other.
Fourth, R must be assigned to locker 4, because R must always be alone.
The question asks who is assigned to locker 4. That’s R.
C is CORRECT.
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