Comprehension Passage

Directions: Study the following information carefully to answer the given questions:

If 'A + B' means 'A is the brother of B'

If 'A $ B' means 'A is the sister of B'

If 'A % B' means 'A is the son of B'

If 'A & B' means 'A is the father of B'

If 'A # B' means 'A is the mother of B'

Which of the following options is true if the expression 'Z & M # P $ K % Y + S' is definitely true?

P is the grandson of Z.

P is the daughter of S.

M is the sister in law of S.

Z is the mother in law of Y.

None of the above