I came across this logical reasoning/ abstract reasoning question in my logical reasoning book. Can somebody please help me identify the next pattern:

Thanks!
I came across this logical reasoning/ abstract reasoning question in my logical reasoning book. Can somebody please help me identify the next pattern:

Thanks!
The number of regions in the pictures (ignoring the background):
$4, 5, 1, 2, 3$.
So probably it will loop back to $4$ in the next picture, hence B.
(Editorial: Not a particularly good puzzle in my opinion.)