This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
Vitamin K is involved in the post translational modification of 
Select and explain. 
A. Glutamate, B. Aspaate, C. Glycine, D. GABA
A: Glutamate
Answer: A: Glutamate 
Explanation: Refer Katzung 11/e p 595 Vitamin K causes gamma carboxylation of glutamate reduces in many clotting factors that result in their activation