In which of the following, interstitial lung disease is least common?

Pulmonary involvement is seen in 35% or scleroderma. It is also fairly common in rheumatoid ahritis. It is seen in only 10% Dermatomyositis. Dermatomyositis is considered to be the result of a humoral attack against the muscle capillaries and small aerioles (endothelium of the endomysial blood vessels). Extramuscular manifestations of the disease may include the following: General systemic disturbances, fever, ahralgia, malaise, weight loss, Raynaud phenomenon Dysphagia, similar to that of scleroderma Atrioventricular defects, tachyarrhythmias, dilated cardiomyopathies GI ulcers and infections Contracture of joints Pulmonary involvement due to weakness of thoracic muscles, interstitial lung disease (least common)