DSSSB · Reasoning

In a certain code language, A + B means ‘A is the mother of B’ A − B means ‘A is the brother of B’ A × B means ‘A is the wife of B’ A ÷ B means ‘A is the father of B’. Based on the above, if P ÷ Q + R − S, then how is P related to S?

  1. mother's father
  2. father's mother
  3. Father
  4. Mother
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