Multiple choice general knowledge Which of the following helps in clotting of blood? Vitamin B1 Vitamin B2 Vitamin D Vitamin K Reveal answer Fill a bubble to check yourself D Correct answer Explanation Vitamin K is essential for blood clotting as it helps produce clotting factors in the liver. Vitamins B1 and B2 are involved in energy metabolism, and Vitamin D helps with calcium absorption. Without adequate Vitamin K, blood cannot clot properly.