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
Recurrent aspiration pneumonia caused by 
Select and explain. 
A. Dermatomyostis/polymyositis, B. Rheumatoid ahritis, C. Progressive systemic sclerosis, D. Systemic lupus erythrematosus
C: Progressive systemic sclerosis
Answer: C: Progressive systemic sclerosis 
Explanation: Answer- C. Progressive systemic sclerosisEsophageal hypomotility and incompetence of the lower esophageal sphincter disease causes chronic gastroesophageal reflux and recurrent episodes of aspiration in systemic sclerosis.