This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
ICD chapter 21 chapter all except 
Select and explain. 
A. Alcohol, B. Tobacco, C. Injury, D. Drugs
C: Injury
Answer: C: Injury 
Explanation: Chapter XXI includes factors influencing health status and contact with health services. Ref : Park&;s textbook of preventive and social medicine; 23rd edition - Page no 50