This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Pharmacology
spider nevi, dilatation of blood vessels is due to 
Select and explain. 
A. Testosterone, B. Estrogen, C. Hepatotoxins, D. FSH
B: Estrogen
Answer: B: Estrogen 
Explanation: Ref Wikipedia A spider angioma as a nevus araneus, spider nevus, vascular spider ,spider telangiectasia is type of telangiectasia found slightly beneath the skin surface The central red dot is the dilated aeriole and the red spider legs are small veins carrying away the freely flowing blood. The dilation is caused by increased estrogen levels in the blood