An ionized gas contains both positive and negative ions. If it is subjected simultaneously to an electric field along the \[+x\]-direction and a magnetic field along the \[+z\]-direction, then

• A. positive ions deflect towards \[+y\]-direction and negative ions towards -y direction
• B. all ions deflect towards \[+y\]-direction
• C. all ions deflect towards \[~-y\]-direction
• D. positive ions deflect towards \[~-y\]-direction and negative ions towards \[~+y\]-direction.