Explanation
To find the expression where R is the brother of T, we need to satisfy two conditions:
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Gender: R must be male.
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Relation: R and T must be siblings (children of the same parents).
Step 1: Eliminate options based on gender
The symbol for brother is # and father is "data−index−in−node="43">\$</span>.Tobemale,<spanclass="math−inline"data−math="R"data−index−in−node="59">R$ should be followed by one of these symbols or be part of a sibling chain where his gender is established.
Step 2: Analyze the remaining options
Final Result
In option (b), the chain established is that R,S, and T are siblings, and R is explicitly defined as a brother.
Final Answer:
The expression U ψ R # S # T correctly means R is the brother of T.
Correct Option: (b)
