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: Social & Preventive Medicine
Tabacco/Smoking is considered as risk factor but not cause of cardiovascular disease because? 
Select and explain. 
A. No temporal association, B. Long latent period, C. Multifactorial causation, D. Less sensitivity
C: Multifactorial causation
Answer: C: Multifactorial causation 
Explanation: Ans. is 'c' i.e., Multifactorial causationMost non-communicable chronic disease (e.g., cardiovascular diseases) are the result of multiple causes and rarely there is a simple one-to-one cause-effect relationship.In the absence of a known agent (i.e.- in multiple causes), the term "risk factor (s)" is used to describe ceain factors which are involved in causation of the disease