Flow-Volume Loops of Obstructive Diseases & Restrictive Diseases and Mnemonics

PYQ[INICET 2020] Which of the following increases in
COPD?
1. FRC
2. TLC
3. VC
4. FEV1/FVC

A. 1 only 
B. 1 and 4 
C. 1and 3 
D. 1 and 2 
Answer:D

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