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: Orthopaedics
A person of 60 years age is suffering from myositis ossificans progressive. The usual cause of death would be - 
Select and explain. 
A. Nutritional deficiency, B. Bed sore, C. Lung disease, D. Septicemia
C: Lung disease
Answer: C: Lung disease 
Explanation: Severe restrictive chest wall disease reduces pulmonary volumes and predisposes to right ventricular dysfunction (cor pulmonale).
Cardiopulmonary failure may lead to premature death.