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 62-year-old patient has been diagnosed with a restrictive pulmonary disease. Which of his following lung measurements is likely to be normal 
Select and explain. 
A. FEV1, B. FVC, C. FEV1/FVC, D. FRC
C: FEV1/FVC
Answer: C: FEV1/FVC 
Explanation: None