1) D

Stuart > Ruth > Margaret
Ruth >Tim
Tim > Adrian
From these inequalities, we can conclude the following:

Stuart > Ruth > Margaret and Tim
We cannot conclude who is taller between Margaret and Tim. The only information given to us is that both of them are shorter than Ruth.
We know Tim is taller than Adrian. However, since we cannot determine who is taller between Tim and Margaret, we also cannot determine who is taller between Margaret and Adrian.

A – this is incorrect. We do not know who is taller between Margaret and Adrian.
B – We know Ruth is taller than Tim and Tim is taller than Adrian. So Ruth must definitely be taller than Adrian. So, this is incorrect.
C – We know that Stuart and Ruth are definitely taller than Adrian. So this is incorrect.
D – Ruth and Stuart are definitely taller than Adrian. We do not know who is taller between Margaret and Adrian. Hence, this option is correct.
E – Stuart is definitely taller than Adrian

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