Match Column - A with Column - B. 

Column-A (Vitamin)		Alternative name
i.	Vitamin A	a.	Ascorbic acid
ii.	Vitamin B12	b.	Retinol
iii.	Vitamin C	c.	Cobalamin
iv.	Vitamin D	d.	Ergocalciferol

The correct answer is i - b, ii - c, iii - a, iv - d.

Key Points 

• Vitamin A:
  • It is fat soluble.
  • Its scientific name is Retinol.
  • Its deficiency causes xeropthalmia.
  • Milk, butter and liver are a source of vitamin A.
• Vitamin B12:
  • Vitamin B12 is also known as cobalamin.
  • It is a water-soluble vitamin involved in the metabolism of every cell of the human body.
  • It is one of eight B vitamins.
  • All forms of vitamin B12 contain the biochemically rare element cobalt (Co) positioned in the centre of a corrin ring.
• Vitamin C:
  • It is a water-soluble vitamin.
  • It is also known as Ascorbic acid.
  • Scurvy is caused by not having enough vitamin C in our diet
  • Vitamin C is mainly found in fruit and vegetables.
• Vitamin D:
  • Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and multiple other biological effects.
  • In humans, the most important compounds in this group are vitamin D3 (also known as cholecalciferol) and vitamin D2 (ergocalciferol).
  • Cholecalciferol and ergocalciferol can be ingested from the diet and from supplements.
  • Only a few foods contain vitamin D.
  • The major natural source of the vitamin is the synthesis of cholecalciferol in the skin from cholesterol through a chemical reaction that is dependent on sun exposure (specifically UVB radiation).