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In a certain code language, P+Q means 'P is the father of Q', PтИТQ means 'P is the son of Q', P├ЧQ means 'P is the wife of Q' and P├╖Q means 'P is the brother of Q'. Based on the above, how is K related to R if 'M ├╖N├ЧO+K├ЧLтИТRтА▓?
Daughter
Son's wife
Mother
Son
Son's wife
Break down the chain from the end to the start. M + N x O + K x L - R means M(father) of N(wife) of O(father) of K(wife) of L(son) of R.
Break down the chain from the end to the start. M + N x O + K x L - R means M(father) of N(wife) of O(father) of K(wife) of L(son) of R.
Analyze the expression
Expression: M ├╖ N x O + K x L - R. Let's decode from right to left or sequentially: L - R means L is the son of R. K x L means K is the wife of L. Since K is the wife of L and L is the son of R, K is the daughter-in-law of R.
Identify K's relation to R
K is the wife of L. Since L is the son of R, the spouse of a person's son is the daughter-in-law of that person.
A: Daughter is incorrect as K is the daughter-in-law. C: Mother is incorrect as R is the parent generation and K is the spouse of R's son. D: Son is incorrect as K is female (wife).
B is correct because L is the son of R and K is the wife of L, making K the daughter-in-law of R.
In blood relations questions with coding, always determine the gender of the target person first to eliminate distractors (e.g., K is wife, so she must be female).
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