Vitamin

 1. B - Jupiter

B1 (thiamin), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate [folic acid]), B12 (cobalamin)

2. E - Venus

3. D - Sun

4. C - Mercury

5. A - Moon

6. K - Mars