or a given spray sample:
A. The volume median diameter (VMD) is equal to number median diameter (NMD).
B. The VMD is less than the NMD.
C. The VMD is larger than the NMD.
D. None of the above.
A. The volume median diameter (VMD) is equal to number median diameter (NMD).
B. The VMD is less than the NMD.
C. The VMD is larger than the NMD.
D. None of the above.