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. `C gt A gt B gt D`
B. `C gt A gt D gt B`
C. `A gt C gt D gt B`
D. `A gt C gt B gt D`

Answer

D

Explanation

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