Correct Option
The correct option is (a) 1 only.
Explanation
Vitamins are organic compounds required in small quantities for normal metabolism, growth, and regulation of body functions. They are classified into fat-soluble (A, D, E, K) and water-soluble (B-complex, C) vitamins, each serving specific physiological roles.
Statement-wise Analysis
- Statement 1 is Correct: Vitamin A (Retinol) is essential for maintaining healthy vision, particularly in low light, and for the integrity of epithelial tissues, including the skin and mucous membranes. Deficiency leads to night blindness and xerophthalmia (dryness of the eye).
- Statement 2 is Incorrect: Vitamin C (Ascorbic Acid) is primarily responsible for the synthesis of collagen, wound healing, and immune function. The vitamin primarily responsible for the clotting of blood is Vitamin K (Phylloquinone), which is essential for the synthesis of clotting factors like prothrombin.
- Statement 3 is Incorrect: Vitamin D (Calciferol) helps the body absorb and utilize Calcium and Phosphorus, which are critical for bone formation and density. It does not primarily assist in the usage of Iron; Iron absorption is significantly enhanced by Vitamin C.
Key Takeaway
Vitamin K is the key factor for blood clotting, while Vitamin D is essential for Calcium absorption and bone health. Vitamin C aids in collagen synthesis and Iron absorption.