Answer:
Option D should be the correct answer.
Explanation:
If we take 1 square multiplied by 4 you get 4. same as second square there are 4 blocks take 4 multiplied by 4 you get 16 block . this 16 block is multiped by 4 you get 64 that is the D one which as 64 block
In easier way stack those block in 1st one by adding those to the corners to get a square typed block like the 2nd one then stack 2nd square block which is 4 squared block all corners you get 16 do it again to get 64 ,
In my opinion it is D , hope you understand.
