Heat absorbed by an ideal gas in a cycle

[Isomorphism]

Homework Statement

Homework Equations

and the attempt at a solution:[/B]
AC is adiabatic and AB is isothermal.

Heat absorbed during process AC = 0 (adiabatic).
Heat absorbed during process CB = $$C_p \triangle T=-\frac{\gamma}{\gamma -1} (P_2V_3 - P_2V_2)$$
Heat absorbed during process BA = $$RT\ln \frac{V_3}{V_1}$$

Summing it up, does not give any of the options. What went wrong?

 

[Chestermiller]

I agree with your answer. In my judgment nothing went wrong.