This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypeension, Subject name: Medicine
Which of the following is False regarding fibromuscular dysplasia ? 
Select and explain. 
A. Most common histologic subtype is medial fibroplasia, B. Mostly affects medium sized vessels, C. Most common in young males, D. String of beads appearance is seen on angiography
C: Most common in young males
Answer: C: Most common in young males 
Explanation: Fibromuscular dysplasia (FMD) Abnormal development or growth of cells in the walls of aeries that can cause the vessels to narrow or bulge. Most common form- Medial fibrosis Young women and affects the distal 2/3 of the main renal aery. Bilateral. The iliac aeries are the limb aeries most likely to be affected by fibromuscular dysplasia. Gross: Alternating thickened and thinned aerial walls give rise to the characteristic "sausage-string" or "string of beads" appearance (especially as seen on angiography) Histology: fibromuscular thickening of the media alternating with areas of thinning and loss of the internal elastic lamina.