Answer:
ithink its A miight be wrong tho hope it helps in someway ig idk
Step-by-step explanation:
You add up all of the sides
I think your answer is WX. The pattern from what I can tell is: ab CD efg HI jkl MN opq RS tuv WX yz.
546 divide by 6 = 91 so 91 times 6 = 546