This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Biochemistry
Vitamin K is required for: 
Select and explain. 
A. Hydroxylation, B. Chelation, C. Transamination, D. Carboxylation
D: Carboxylation
Answer: D: Carboxylation 
Explanation: Vit k Act as coenzyme in Carboxylation of clotting factor 2,7,9,10 Only fat-soluble vitamin with coenzyme function. 3 forms k1-phyloquinone k2-menaquinone k3-manadione (water soluble)-synthetic form Deficiency lead to hemorrhagic disease of new born Prophylactic administration of Vit k for all new born advised