This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Following are the post moem findings in carbon monoxide poisoning except - 
Select and explain. 
A. Froth at mouth and nose, B. Blue skin discoloration, C. Basal ganglia cavitation, D. Congested lungs
B: Blue skin discoloration
Answer: B: Blue skin discoloration 
Explanation: Autopsy findings cherry red discoloration of skin,mucous membrane,nail bed blood is fluid fine froth in mouth and nose congestion of lungs,pulmonary edema hemorrhages in meninges and cox Features of asphyxia REF;THE SYNOPSIS OF FORENSIC MEDICINE:KS NARAYANA REDDY;28th EDITION;PAGE NO 360