Which of the following vitamins is helpful in delaying blood clotting?

Vitamin $B_{12}$ contains which of the following metals?

From the vitamins $A, B_1, B_6, B_{12}, C, D, E$ and $K$,the number of vitamins that can be stored in our body is............

Match the following vitamins with their sources and the corresponding diseases caused by their deficiency.

Vitamins	Sources and Diseases
$(A)$ $Vitamin-B_1$	$(i)$ Egg-whites,$(p)$ Convulsions
$(B)$ $Vitamin-B_2$	$(ii)$ Fish,$(q)$ Pernicious anemia
$(C)$ $Vitamin-B_6$	$(iii)$ Green vegetables,$(r)$ Cheilosis
$(D)$ $Vitamin-B_{12}$	$(iv)$ Grams,$(s)$ Beri-Beri

The vitamin that helps in the clotting of blood is

Assertion : Vitamin $D$ cannot be stored in our body.
Reason : Vitamin $D$ is a fat-soluble vitamin and is excreted from the body in urine.