A intentionally and falsely leads B to believe that certain land belongs to A, and thereby induces B to buy and pay for it. The land afterwards becomes the property of A, and A seeks to set aside the sale on the ground that, at the time of the sale, he had no title. Applying Section 115,

• A. he must be allowed to prove his want of title
• B. he may be allowed to prove his want of title
• C. he must not be allowed to prove his want of title
• D. none of them