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: Medicine
A 40-yr-female progressive dyspnea from 1 yr. She also has b/I bibasilar end inspiratory crepitation. The true statement is: 
Select and explain. 
A. May be assocated with connective tissue disease, B. Residual volume (upword arrow) ed, C. (upward arrow) Total lung capacity (TLC), D. None
A: May be assocated with connective tissue disease
Answer: A: May be assocated with connective tissue disease 
Explanation: The patient is having interstitial inflammatory lung disease with progressive dyspnea & bilateral basal end-inspiratory crackles.9% of ILD can be associated with connective tissue disorders like, SLE, Rheumatoid arthritis, Ankylosing spondylitis, Systemic sclerosis, Sjogren's syndrome, polymyositis-dermatomyositis. 
In ILD associated with connective tissue disorders, clinical findings suggestive of it like musculoskeletal pain, weakness, fatigue, fever, joint pain or swelling, photosensitivity, Raynaud's phenomenon, pleuritis, dry eyes, dry mouth etc can be present.