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: Social & Preventive Medicine
Decreased level of serum Vit B6 is seen in 
Select and explain. 
A. CRF, B. INH therapy, C. CHF, D. Alcohol
B: INH therapy
Answer: B: INH therapy 
Explanation: None