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Step-by-Step Solution
'X $ Y' means X > Y, so P > Q, Q > R and R > S give P > Q > R > S. P is the greatest.
Answer: B) P
In a certain coding of comparisons, 'X $ Y' means X is greater than Y. If 'P $ Q', 'Q $ R' and 'R $ S' are all true, who is the greatest?
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