RRB RPF Constable 04 Feb 2019 Solved Paper

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Question : 115 of 120
 
Marks: +1, -0
Read the following statements and answer the following question.
A4B means A is the mother of A,
A3B means A is the father of B 
A5B means A is sister of A,
A7B means that A is brother of B,
equation P7Q3R3S, what is the type from P, S Related?
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