16.  Which metal is important component of vitamin B12-

17.  In vitamin B12 which metal ion present -

18.  What caused by deficiency of vitamin - C

19.  In which following less amount caused anemia-

20.  Iron deficiency cause-

21.  Which vitamin deficencent due to washing of pecledegetable-

22.  Scurvy disease caused the deficiency of -

23.  In which found in tobacco-

24.  Which disease occurs due to deficiency of iron?

25.  The study of medieive and it work is known as-

26.  Vitamin D is important for-

27.  Which types of vitamin fastly synthesize in body.

28.  Which deficiency cause bending of bone of child-

29.  In which rich source of vitamin - C-

30.  By which prove firstly presence of cobalt in B12.