Which expression is equal to det(abcd)\det \begin{pmatrix} a & b \\ c & d \end{pmatrix}det(acbd)?
aC11+cC12aC_{11} + cC_{12}aC11+cC12
aC11+bC12aC_{11} + bC_{12}aC11+bC12
cC11+dC12cC_{11} + dC_{12}cC11+dC12
bC11+aC12bC_{11} + aC_{12}bC11+aC12