Bleeding of gums, falling of teeth, fragile bones and delayed wound healing occur due to the deficiency of which one of the following vitamins?

The symptoms described—bleeding gums, falling (wobbly) teeth, fragile bones, and delayed wound healing—are classic clinical manifestations of Vitamin C deficiency, a condition known as scurvy [3]. Vitamin C (ascorbic acid) is essential for the synthesis of collagen, a structural protein required for the development and maintenance of skin, bones, and connective tissues. Without sufficient Vitamin C, collagen formation is impaired, leading to weakened blood vessels (causing gingival bleeding and bruising), poor wound healing, and bone demineralization [3]. While Vitamin D is primarily associated with bone mineralization and rickets, and Vitamin K with blood clotting, the specific combination of oral health issues (bleeding gums and tooth loss) alongside impaired healing is the hallmark of scurvy [1]. Severe deficiency can also lead to anemia and joint pain [3].

Sources

1. [1] https://www.healthdirect.gov.au/vitamin-c-deficiency
2. [3] https://www.sciencedirect.com/topics/biochemistry-genetics-and-molecular-biology/scurvy