JEE Main 2019 Physics question

Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an n-type semiconductor, the density of electrons is m and their mobility is 1.6 m/(V.s) then the resistivity of the semiconductor (since it is an n-type semiconductor contribution of holes is ignored) is close to:

• (A)0.4 ΩmCorrect
• (B)2 Ωm
• (C)4 Ωm
• (D)0.2 Ωm