Medicine Following is true about cystic Fibrosis A Nasal polyposis is absent B Sweat chloride levels > 30 mmol / L is diagnostic C Staphylococcus is most common pathogen causing infection in cystic fibrosis in adults. D Chromosome - 7 genetic defect 💡 Explanation Following is true about cystic Fibrosis ✓ Correct Answer: D. Chromosome - 7 genetic defect