This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gas Transport, Subject name: Physiology
Hypercarbia is characterized by : 
Select and explain. 
A. Miosis, B. Cool extremities, C. Bradycardia, D. Hypertension
D: Hypertension
Answer: D: Hypertension 
Explanation: Ans. is 'd' i.e. hypertension Hypercarbia causes:1. Tachycardia and increased C.O., due to direct effect of C02 on the heart and reflex sympathetic stimulation.Hypertension, because central sympathetic overactivity causes peripheral vasoconstriction.Mydriasis (Although mydriasis is not mentioned directly, but in hypercarbia there in sympathetic activation with a rise of circulating catacholamines which will cause pupillary dilatation)No ideas about the extremities.