Which figure should replace the question mark (?) if the following series were to be continued?

Correct option is A

first three figures and last three figures follows same logic.

from figure 1 to 2 and 3 to 4, same pattern and from figure 2 to 3 and 4 to 5 same pattern.

B and X are interchanging  similarly B and = interchanging 

as figure 2nd to 3rd element shifts similarly elements are shifting in figure 4th to 5th

as L comes in figure 3rd as a new letters similarly 4 comes as a new element in missing term.