Which one of the following rocks and reservoir fluids are arranged in the decreasing order of their electrical resistivity?

Q. Which one of the following rocks and reservoir fluids are arranged in the decreasing order of their electrical resistivity? Assume that rocks have equal porosity and are filled with brine.

(A) Shale > Brine > Sandstone > Limestone > Gas

(B) Gas > Shale > Sandstone > Limestone > Brine

(C) Gas > Limestone > Sandstone > Shale > Brine

(D) Shale > Brine > Limestone > Sandstone > Gas

Ans: Gas > Limestone > Sandstone > Shale > Brine