This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
Which is not elevated in a child presenting with icterus, Pruritus and clay coloured stools 
Select and explain. 
A. Gamma glutamyl transpeptidase, B. Alkaline phosphatase, C. 5'- nucleotidase, D. Glutamate dehydrogenase
D: Glutamate dehydrogenase
Answer: D: Glutamate dehydrogenase 
Explanation: The child is suffering from obstructive jaundice or Cholestasis Enzymes elevated in Chloestasis ALP 5'-Nucleotidase Gamma glutamyl transpeptidase Ref: Harrison's 19th edition Pg no : 1997