This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
Consider the following 1.Lactic Acid 2.Sorbic Acid 3.Sulphurous acid Which of the above are food preservatives 
Select and explain. 
A. 1 and 2 only, B. 2 and 3 only, C. None of these, D. 1, 2 and 3
D: 1, 2 and 3
Answer: D: 1, 2 and 3 
Explanation: Food preservatives Substances, which if added to food, are capable of inhibiting, retarding or arresting the process of fermentation acidification or other decomposition Class I preservatives Class II preservatives Common salt Benzoic acid Sugar, Dextrose, Glucose Sulphuric acid Spices Sorbic acid, Lactic acid Honey Nicin Vinegar, Acetic acid Propionic acid Ref : THE PFA Act 1954 Pgno : 91