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: Pediatrics
A 3 month old asymptomatic infants with H/O TB exposure has taken 3 months of chemoprophylaxis of INH. what is done next? 
Select and explain. 
A. Test sputum and then decide, B. Continue INH for 3 more months, C. Do tuberculin test,then decide, D. Immunize with BCG and stop prophylaxis
B: Continue INH for 3 more months
Answer: B: Continue INH for 3 more months 
Explanation: Here child is asymbtomatic. This child born to mother who has diagnosed to have TB in pregnancy. should receive INH prophylasis for 6 months.