Match the function with the correct vitamin.
1. Necessary for rhodopsin synthesis
2. Component of FAD and involved in the citric acid cycle
3. Component of NAD and involved in glycolysis and citric acid cycle
4. Constituent of coenzyme-A, and involved in steroid hormone synthesis
5. Prevents birth defects
6. Involved in collagen synthesis and general protein metabolism
7. Promotes calcium and phosphorus use
8. Prevents oxidation of plasma membranes and DNA
9. Required for synthesis of many clotting factors