Three large non conducting plane sheets of charge with charge densities \( \sigma, 2 \sigma \) a...

Three large non conducting plane sheets of charge with charge densities \( \sigma, 2 \sigma \) and \( 3 \sigma \) are arranged as shown. The net electric field in region III will be
(1) \( \frac{3 \sigma}{\epsilon_{0}} \) (towards left)
(2) \( \frac{2 \sigma}{\epsilon_{0}} \) (towards left)
(3) 0
(4) \( \frac{3 \sigma}{\epsilon_{0}} \) (towards right)