This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Regarding Genome therapy all are true except 
Select and explain. 
A. Gene also considered as drug, B. Has been tried in cystic fibrosis, C. It is used for cloning, D. None
A: Gene also considered as drug
Answer: A: Gene also considered as drug 
Explanation: None