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
Which of the following drugs is capable of maintaining blood levels for 24 hours after a single administration but has useful antianginal effects lasting only about 10 hours? 
Select and explain. 
A. Amyl nitrite, B. Isosorbide mononitrate, C. Nitroglycerine (sublingual), D. Nitroglycerine (transdermal)
D: Nitroglycerine (transdermal)
Answer: D: Nitroglycerine (transdermal) 
Explanation: (Ref: KDT 6/e p525) Continous presence of nitrates in blood will result in tolerance.