AIIMS 2017 Zoology Deficiency Diseases MCQ Question

Vitamin A is a fat-soluble vitamin essential for vision, and its deficiency can lead to night blindness due to impaired retinal function. Option B is incorrect because vitamin K, also fat-soluble, is associated with blood clotting and not with beri-beri, which is a deficiency of thiamine (vitamin B₁). Option C incorrectly pairs vitamin A with beri-beri, while option D misclassifies vitamin K as water-soluble and associates it with pellagra, a condition caused by niacin (vitamin B₃) deficiency. Understanding the solubility and functions of vitamins is crucial for recognizing their deficiency diseases.