Section 122 of the Transfer of Property Act defines a 'gift' and its essentials. A valid gift requires: (1) a transfer of ownership, (2) of existing property, (3) made voluntarily and without consideration, and (4) accepted by the donee *during the lifetime of the donor*.
\[\begin{array}{rl} \bullet & \text{(A) is incorrect; acceptance must be before the donor's death.} \\ \bullet & \text{(D) is incorrect; a gift must be without consideration.} \\ \bullet & \text{(C) Registration is the required *mode of transfer* for a gift of immovable property (under S.123), but not a universal condition for all gifts (e.g., movable property).} \\ \bullet & \text{(B) The transfer of ownership, which is completed by delivery of possession (for movable property) or registration (for immovable property), is a core component.} \\ \end{array}\]