Social & Preventive Medicine A patient with cough was sputum AFB negative but chest X-ray was suggestive of TB. What should be the next step according to RNTCP? A Line probe assay B Culture C Nucleic acid amplification test D Tuberculin test 💡 Explanation A patient with cough was sputum AFB negative but chest X-ray was suggestive of TB. What should be the next step according to RNTCP? ✓ Correct Answer: C. Nucleic acid amplification test