Multiple choice general knowledge science & technology Blood fails to clott quickly is a deficiency symptoms for Vitamin C Vitamin D Vitamin A Vitamin K Reveal answer Fill a bubble to check yourself D Correct answer Explanation Vitamin K deficiency causes bleeding disorders because Vitamin K is essential for blood clotting. It is required for the synthesis of clotting factors II, VII, IX, and X. The question misspells 'clot' as 'clott'.