'L + U’ means ‘L is the sister of U’.‘L # U’ means ‘L is the husband of U’.‘L $ U’ means ‘L is the daughter of U’.‘L % U’ means ‘L is the mother of U’.‘L @ U’ means ‘L is the brother of U’.Which of the following expressions denotes that ‘M is the wife of O’?

• A. O @ R + K + P % M
• B. M % P # K + R $ O
• C. P $ M % R + K % O
• D. M % P + K @ R $ O