Two Planes of Charge with No Thickness,A and B,are Parallel $\frac { 3 \sigma } { 2 \varepsilon _ { 0 } }$

Multiple Choice

Two planes of charge with no thickness,A and B,are parallel and vertical.The electric field in region I to the left of plane A has magnitude $\frac { 3 \sigma } { 2 \varepsilon _ { 0 } }$ and points to the left.The electric field in the region to the right of B has magnitude $\frac { 3 \sigma } { 2 \varepsilon _ { 0 } }$ and points to the right.The electric field in the region between the two planes has magnitude $\frac { \sigma } { 2 \varepsilon _ { 0 } }$ and points to the right.The surface charge density on planes A and B respectively is

A) $- \frac { \sigma } { 2 }$ , $\sigma$ .
B) $+ \frac { \sigma } { 2 }$ , $\sigma$
C) $\sigma$ , $- \frac { \sigma } { 2 }$ .
D) $\sigma$ , $+ \frac { \sigma } { 2 }$ .
E) 2 $\sigma$ , $\sigma$ .