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: Anaesthesia
Causative factor for acne are all except. 
Select and explain. 
A. Androgen, B. Only food, C. Bacterial contamination, D. Hypercornification of duct
B: Only food
Answer: B: Only food 
Explanation: B i.e. Only food