This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
International Olympic committee has prohibited the use of all of the following except 
Select and explain. 
A. Salbutamol, B. Furosemide, C. Estrogen, D. Nandrolone
A: Salbutamol
Answer: A: Salbutamol 
Explanation: (A) Salbutamol # All BETA-2 AGONISTS (including both optical isomers where relevant, are prohibited except salbutamol (maximum 16 micrograms over 24 hours), formoterol (maximum 36 micrograms over 24 hours, and salmeterol when taken by inhalation in accordance with the manufacturers' recommended therapeutic regime."