The correct answer is option 1: 1, 2, 3, and 4 are all vitamins.

Vitamins are essential organic compounds that our body needs in small amounts to function properly. They play a crucial role in various bodily functions and help maintain good health.

1. Ascorbic acid, also known as Vitamin C, is a water-soluble vitamin. It is important for the growth, development, and repair of body tissues, as well as for boosting the immune system and reducing the risk of chronic diseases.

2. Folic acid, also known as Vitamin B9, is a water-soluble vitamin. It is essential for the production and maintenance of new cells, particularly red blood cells. Folic acid is important for preventing birth defects and is often recommended for pregnant women.

3. Nicolinic acid, also known as niacin or Vitamin B3, is a water-soluble vitamin. It plays a key role in converting food into energy, maintaining healthy skin and nerves, and supporting the digestive system.

4. Pantothenic acid, also known as Vitamin B5, is a water-soluble vitamin. It is important for the synthesis of coenzyme A, which is involved in various metabolic pathways.