However, I don't know about the land bringing out the truth....if that's the case, Maan would have known that Dev was behind selling the land to him in the beginning....which came thro thro some agent.
But, once Maan learns that Geet was cheated in marriage and finds out how far the fraud went....her land and jewelry being stolen from her....he'll remember her saying she never sold the land..., he'll probably check out the background of the sale and then find Dev/NT's hand behind it..