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: Pharmacology
Opium is a derivative of: 
Select and explain. 
A. Solanum tuberosum, B. Datura stromonium, C. Papaver somniferum, D. Nicotiana tobacum
C: Papaver somniferum
Answer: C: Papaver somniferum 
Explanation: None