Deficiency of vitamin K causes :

Solution

Chemistry ma’am · 3 steps

Vitamin K is the clotting vitamin: take it away and blood takes longer to clot.

1. What vitamin K does. The liver needs vitamin K to make prothrombin and several other clotting factors. Without these factors, the chain of reactions that forms a clot runs slowly.
2. Effect of deficiency. With too little vitamin K, fewer active clotting factors are made. So blood takes longer to clot, and even small cuts can bleed for a long time (haemorrhage).

   Option	Actually linked to
   Cheilosis	Vitamin B₂ (riboflavin) deficiency
   Decrease in clotting time	The opposite of vitamin K deficiency
   Increase in clotting time	Vitamin K deficiency
   Increased fragility of RBCs	Vitamin E deficiency

3. So. Deficiency of vitamin K causes an increase in blood clotting time, option (c).

The idea to keep. Pair each vitamin with its one signature deficiency: K with slow clotting, E with fragile RBCs, B₂ with cheilosis, C with scurvy, D with rickets, A with night blindness.

Answer from the NTA final answer key. Solution by PrepWiser.