This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
Folic acid: 
Select and explain. 
A. Is also called as pteroyl glutamic acid, B. Is useful in carriage of one carbon atom moiety, C. Tetrahydrofolate is the active form, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: All the given statements about folic acid are true. From essential of medical pharmacology K D Tripati 7th edition Page no 609