This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
Which of the following laboratory findings is known as 'biochemical marker of pre-eclampsia'? 
Select and explain. 
A. Low platelets, B. Raised serum Na, C. Elevated liver enzymes, D. Serum uric acid
D: Serum uric acid
Answer: D: Serum uric acid 
Explanation: A serum uric acid level (biochemical marker of pre-eclampsia) of more than 4.5 mg/dl indicates the presence of pre-eclampsia. Blood urea level remains normal or slightly raised. Serum creatinine level may be more than 1 mg/dl. There may be thrombocytopenia and abnormal coagulation profile of varying degrees. Hepatic enzyme levels will be increased. Ref: Textbook of Obstetrics D C Dutta, 6th edition, Page 227.