This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
True about anaphylactic shock 
Select and explain. 
A. Raised PR, B. Peripheral vasoconstriction, C. Raised BP, D. Raised cardiac output
A: Raised PR
Answer: A: Raised PR 
Explanation: Due to histamines vasodilation occurs.