A, a practicing lawyer represented B in the intestate proceedings of his father. The agreement is on a contingency basis as B did not have money to pay the services of A. To secure the payment of B s obligation, they executed a mortgage over of what B will receive from the estate of his father. Is the mortgage valid?

• A. Yes, because what is prohibited by law is sale between the client and the lawyer;
• B. Yes, because it merely serves as security for the payment of an obligation;
• C. No, because even if what is prohibited by law is sale, it is a circumvention of the law;
• D. Yes, because of the liberty of contracts.