If the real exchange rate is appreciating, the nominal exchange rate can be depreciating as long as:
a) (Price in home country / Price in foreign country) is rising faster than the nominal exchange rate is falling.
b) (Price in foreign country / Price in home country) is falling faster than the nominal exchange rate is falling.
c) (Price in home country / Price in foreign country) is falling faster than the nominal exchange rate is falling.
d) (Price in foreign country / Price in home country) is rising faster than the nominal exchange rate is falling.