Fatema, 26yrs, having limited cutaneous scleroderma for the last 10 years complains of shortness of breath for last one month. Her pulmonary function tests (PFT)are as follows: PFT Observed Predicted FVC 2.63 2.82 FEV1 88% 80% DLCO 5.26 16.3 What is the diagnosis?

• A. Congestive heart failure
• B. Bronchiectasis
• C. Interstitial lung disease
• D. Pulmonary artery hypertension