Here's a breakdown of the vitamin deficiencies and their corresponding diseases, along with the correct matching: Understanding the Deficiencies: Vitamin K Deficiency: Vitamin K is essential for blood clotting. A deficiency can lead to excessive bleeding, but it rarely causes haemophilia (a genetic bleeding disorder). Vitamin B12 Deficiency: B12 is crucial for red blood cell production. A deficiency results in pernicious anemia, a type of anemia caused by the body's inability to absorb B12. Vitamin B2 (Riboflavin) Deficiency: Riboflavin is vital for cell growth and development. A deficiency can lead to cheilosis, which is characterized by cracks and sores at the corners of the mouth. Vitamin D Deficiency: Vitamin D is important for calcium absorption and bone health. A deficiency causes osteomalacia (softening of the bones) in adults. Matching the Columns: The correct matching is: Option A: A−S‌‌B−R‌‌C−P‌‌D−Q Explanation: A-S: Vitamin K(A) is associated with haemophilia (S), though it's not the direct cause. B-R: Vitamin B12(B) causes pernicious anemia (R). C-P: Vitamin B2(C) leads to cheilosis (P). D-Q: Vitamin D (D) deficiency results in osteomalacia (Q).