The correct answer to the question is option 3: Folic acid.
Folic acid is a type of B vitamin that plays a critical role in the production and maintenance of new cells, including red blood cells. It is essential for the synthesis of DNA and RNA, which are necessary for the formation of red blood cells.
When there is a deficiency of folic acid in the diet, it can lead to a condition known as folic acid deficiency anemia. This type of anemia is characterized by a decrease in the number of red blood cells and a decrease in their ability to carry oxygen. Symptoms of folic acid deficiency anemia may include fatigue, weakness, shortness of breath, and pale skin.
It is important to note that while the other options, ascorbic acid (option 1), citric acid (option 2), and nicotinic acid (option 4), are all important in various biological processes, they do not directly relate to the development of anemia. Therefore, they are not the correct answers to the question.