The following facts are available:
`2A^_+B_2to2B^-+A_2`
`2C^(-)+B_2to` No reaction
`2D^-+A_2to2A^(-)D_2`
Which of the following statements is correct?

Options

A. `E_(C^-//C_2)^@ gt E_(B^-//B_2)^@ gt E_(A^-//A_2)^@ gt E_(D^-//D_2)^@`
B. `E_(C^-//C_2)^@ lt E_(B^-//B_2)^@ lt E_(A^-//A_2)^@ lt E_(D^-//D_2)^@`
C. `E_(C^-//C_2)^@ lt E_(B^-//B_2)^@ gt E_(A^-//A_2)^@ gt E_(D^-//D_2)^@`
D. `E_(C^-//C_2)^@ gt E_(B^-//B_2)^@ lt E_(A^-//A_2)^@ lt E_(D^-//D_2)^@`

Answer

A

Explanation

From the first reaction we conclude
`E_(B^-//B_2)^@ > E_(A^-//A_2)^@`
From the second reaction we conclude
`E_(c^-//c_2)^@ > E_(B^-//B_2)^@`
From the second reaction we conclude
`E_(A^-//A_2)^@ > E_(D^-//D_2)^@`
Therefore `E_(C^-//C_2)^@ > E_(B^-//B_2)^@ > E_(A^-//A_2)^@ > E_(D^-//D_2)^@`