This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: vitamins, Subject name: Biochemistry
Which of the following is a Water-soluble Vitamin? 
Select and explain. 
A. Folic acid, B. Vitamin A, C. Vitamin K, D. Linolenic acid
A: Folic acid
Answer: A: Folic acid 
Explanation: The four vitamins, namely vitamin A, D, E, and K are known as fat or lipid soluble. water soluble vitamins thiamine, riboflavin, niacin, pyridoxine, pantothenic acid, biotin, folic acid, Vit B12, ascorbic acid ref DM vasudevan 8th ed page 466