Q: 33 (IES/2009)

Consider the following :
1. Acetic acid
2. Ascorbic acid
3. Citric acid
4. Folic acid
Which of the above are vitamins ?
question_subject: 
Science
question_year: 
2009
question_exam: 
IES
stats: 
0,2032,1720,360,2040,288,1064