In Garbled Circuits party $P_1$ garbles the original truth table by arbitrary choosing or by some other method values. Table (b) represents the garbled values corresponding to each entry in the original truth table.
My question is: What does the last column in garbled table represents? In the original table we have three columns but in garbled table we have a fourth column of the form $H(k^{a}_{0}\left | \right | k^{b}_{1}\left | \right | g_{1})\oplus k^{a\vee b}_{2}$.
Note: There is a mismatch between the notation in the circuit diagram and the table in the figures below. Subscribt and superscript has been switched.