Multiple choice general knowledge science & technology 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. Unlike B1, B2, or D, which have different roles (energy metabolism, skin health, calcium absorption), K directly enables coagulation.