These questions are based on the following information. Study it carefully and answer the questions.
(i) 'A × B' means 'A is father of B'.
(ii) 'A ÷ B' means 'A is daughter of B'.
(iii) 'A + B' means 'A is sister of B'.
(iv) 'A – B' means 'A is husband of B'.
Which of the following indicates 'N is mother of K'?