Assertion`(A): ` The rusting on the surface of iron involves following reaction `:`
`a. Fe(s) rarr Fe^(2+)(aq)+2e^(-)`
`(` at anodic site `)`
`b. O_(2)(g) +4H^(o+)(aq)+4e^(-) rarr 2H_(2)O(l)`
`(` at cathodic site `)`
`c. 4Fe^(2+)(aq)+O_(2)(g) +4H_(2)O(l) rarr 2Fe_(2)O_(3)(s)+8H^(o+)`
`d.Fe_(2)O_(3)(aq)+xH_(2)O(l) rarr Fe_(2)O_(3).xH_(2)O`
Reason `(R) : ` Rusting is accelerated in the presence of `NaCl` and `CO_(2)`

Options

A. If both `(A)` and `(R)` are correct, and `(R)` is the correct explanation of `(A)`.
B. If both `(A)` and `(R)` are correct, but `(R)` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R)` is incorrect.
D. If `(A)` is incorrect, `(R)` is correct.

Answer

b