This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
28 year old woman has been treated with several autonomic drugs for about a month. Which of the following signd would distinguish between an overdose of a muscarinic blocker and a ganglionic blockers 
Select and explain. 
A. Blurred vision, B. Dry mouth, constipation, C. Mydriasis, D. Postural hypotension
D: Postural hypotension
Answer: D: Postural hypotension 
Explanation: Ref-KDT 6/e p115 Postural hypotension is due to blockade of sympathetic system. Ganglion blockers in heavy they transmission through both sympathetic as well as parasympathetic ganglia where as muscarinic brokers inhibitat only parasympathetic activity