Practice question

Correct option is D, RV. In Lung Volumes, Capacities and Regulation, the accurate description is RV, and that is what you should commit to memory. Keep the definition tight and the role clear — the stem is asking for the statement that does not fit the usual rule, and RV is that exception in the context of Lung Volumes, Capacities and Regulation. Then RV is the answer you can defend. Check yourself by covering the options and writing the answer first, then matching the letter — that builds confidence. If the wording feels dense, translate it into everyday language first, then map that plain sentence back onto RV.