This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
Postural hypotension and failure of ejaculation is most commonly seen in treatment with:(1991) 
Select and explain. 
A. Guanethedine, B. Minoxidil, C. Propranolol, D. Sodium nitroprusside
A: Guanethedine
Answer: A: Guanethedine 
Explanation: aRef: KDT, 5th ed, p. 514 & 4th ed, p. 551