Read the following information carefully and answer the questions given below.
In a joint family of seven persons L, M, N, O, P, Q and R, two are married couple. ‘R’ is a housewife and her husband is a lawyer. ‘N’ is the wife of ‘M’,‘L’ is an engineer and is the grand-daughter of ‘R’ and ‘O’ is the father-in-law of 'N', a doctor, and father of P a professor. ‘Q’ is L’s brother and M’s son.
Who is M’s father?
On the basis of the given information, the blood relation diagram is as following.
O is M's father.