Choose the next diagram in the above series from the options given below:

The logic followed here is:

1) First box series ⇒ Top and bottom elements shift to the opposite sides and the center element is replaced by another element i.e.'' replaced by '' and vice-versa.

2) Second box series ⇒ Middle elements interchange positions and the top element shift to the opposite side along with replacement with another element i.e. '' replaced by '' and vice-versa.

Thus, the final series is:

Hence, "Option 2" is the correct answer.