Based on the following information, arrange four metals A, B, C and D in the order of decreasing ability to act as reducing agents:
(I) only A,B and C react with 1 M HCI to give `H_(2) (g)`
(II) When C is addd to solution of the other metal ions, metallic B and D are formed
(III) Metal C does not reduce `A^(n+)` `CgtAgtBgtD`, `CgtAgtDgtB`, `AgtCgtDgtB`, `AgtCgtBgtD`

Options

A. `CgtAgtBgtD`
B. `CgtAgtDgtB`
C. `AgtCgtDgtB`
D. `AgtCgtBgtD`

Answer

A

Explanation

D does not react with HCI so not easily oxidized compared to A,B and C reduced B as well as D but unalble to reduce A so A is oxidized easily as compare `therefore` ability to acts as easily as compare to other metals