Answer:
Option B
Explanation:
$P+Q\div R\times S-T$ means P is the son of Q.Q is the mother of R,R is the father of S and S is the daughter of T.Hence S is the nephew of P.
$P\times Q\div R-S+T$ means P is the father of Q ,Q is the mother of R,R is the daughter of S and S is the son of t.Hence S is the son-in-law of P.
$P+Q\times R-S\div T$ means P is the son of Q,Q is the father of R,R is the daughter of S and S is the mother of T.Hence S is the mother of P.
$P\times Q-R\div S\times T$ means P is the father of Q ,Q is the daughter of R,R is the mother of S and S is the father of T.Hence S is the son of P.