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: Pharmacology
Decreased effect of warfarin is seen in case of : 
Select and explain. 
A. Nephrotic syndrome, B. Acute intake of alcohol, C. Concurrent treatment with phenylbutazone, D. Congestive heart failure
A: Nephrotic syndrome
Answer: A: Nephrotic syndrome 
Explanation: None