The adjoining figure shows two different arrangements in which two ...

The adjoining figure shows two different arrangements in which two square wire frames of same resistance are placed in a uniform constantly decreasing magnetic field \( \mathrm{B} \).
\( P \)
The value of magnetic flux in each case is given by
(A) Case I: \( \Phi=\pi\left(\mathrm{L}^{2}+\ell^{2}\right) \) B; Case II: \( \Phi=\pi\left(\mathrm{L}^{2}-\ell^{2}\right) \mathrm{B} \)
(B) Case I: \( \Phi=\pi\left(\mathrm{L}^{2}+\ell^{2}\right) \) B; Case II: \( \Phi=\pi\left(\mathrm{L}^{2}+\ell^{2}\right) \mathrm{B} \)
(C) Case I: \( \Phi=\left(\mathrm{L}^{2}+\ell^{2}\right) \) B; Case II: \( \Phi=\left(\mathrm{L}^{2}-\ell^{2}\right) \mathrm{B} \)
(D) Case I: \( \Phi=(\mathrm{L}+\ell)^{2} \mathrm{~B} ; \) Case II: \( \Phi=\pi(\mathrm{L}-\ell)^{2} \mathrm{~B} \)