Samples from EITHER NPY$/$AGRP neurons OR from POMC neurons of wild$-$type mice were monitored in the absence and presence of leptin via Western blotting. The data are shown below.$$

Choose the answer that correctly identifies the NPY$/$AGRP neuronal samples obtained in the ABSENCE and then the PRESENCE of leptin.

Question $7$Select one:

a$.$

B; C

b$.$

D; B

c$.$

A; C

d$.$

C; A