This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pregnancy induced Hypeension, Subject name: Gynaecology & Obstetrics
Which one of the following anti-hypeensive drugs is contraindicated in pregnancy? 
Select and explain. 
A. Alpha methyldopa, B. Hydralazine, C. Nifedipine, D. Frusemide
D: Frusemide
Answer: D: Frusemide 
Explanation: Diuretics in pregnancy- In a PIH patient, furosemide is C/I as an anti-hypeensive because in PIH the intravascular volume is low. Thats because the pathology is Vasospasm and hence there is intravascular 'Low vloume'. Giving a diuretic would fuher decrease the intravascular volume and hence reduce the placental perfusion. However, in a pregnant female with Hypeension of pregnancy complicated with CHF/Pulmonary edema, then diuretics can be used