Deficiency of which vitamin does not allow blood to clot?

The correct option is D Vitamin K
Vitamin K plays a key role in helping the blood clot, preventing excessive bleeding. Unlike many other vitamins, vitamin K is not typically used as a dietary supplement. Vitamin K is an essential vitamin that is needed by the body for blood clotting and other important processes. Vitamin K is a vitamin found in leafy green vegetables, broccoli and Brussels sprouts. The name vitamin K comes from the German word “Koagulations vitamin.” In the body, vitamin K plays a major role in blood clotting. So, it is used to reverse the effects of “blood thinning” medications when too much is given to prevent clotting problems in newborns who do not have enough vitamin K and to treat bleeding caused by medications including salicylates, sulfonamides, quinine, quinidine or antibiotics.