True regarding fibromuscular dysplasia are all except

OCPS predispose Fibromuscular dysplasia affects mainly medium and large aeries. Sometimes alteration of the normal normal structure of the aerial wall gives rise to true aneurysms. There is also associated irregular hyperplasia. Muir's Textbook of pathology Edited by JR Anderson, 12 th edition, page no 14.36 Answer is option 2