10. Deed of sale of aforesaid land

The spouses X and Y mortgaged a piece of registered land to A, delivering as well the OCT to the latter, but they continued to possess and cultivate the land, giving 1/2 of each harvest to A in partial payment of their loan to the latter. A, however, without the knowledge of X and Y, forged a deed of sale of the aforesaid land in favor of himself, got a TCT in his name, and then sold the land to B, who bought the land relying on A's title, and who thereafter also got a TCT in his name. It was only then that the spouses X and Y learned that their land had been titled in B's name. May said spouses file an action for reconveyance of the land in question against b? Reason. (5%)