This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypertensive Disorders in Pregnancy, Subject name: Gynaecology & Obstetrics
All are prognostic indicators of pregnancy induced hypertension. Except - 
Select and explain. 
A. Low platelets, B. Serum Na, C. Elevated liver enzymes, D. Serum uric acid
B: Serum Na
Answer: B: Serum Na 
Explanation: Ans. is 'b' Raised serum Na (Ref Dutta, 6/e, p 226, 227 (4/e, p. 247, 239)).Prognostic indicators of pregnancy induced hypertension are not mentioned any where. Only factors which are used to assess the severity and the parameters used in progress chart after treatment are given in Dutta.These factors can be used to assess prognosis in case of PIH. These factors are :Blood pressureProtein excretionPlatelet countSerum uric acidElevated liver enzymeBlood urea nitrogenOphthalmological examination for retinal hemorrhages or exudates