Which of the following reactions represents " developing"in photography ?

Options

A. `AgNO_(3)+NaBrrarrAgBr+NaNO_(3)`
B. `AgNO_(3)+2Na_(2)S_(2)O+_(3)rarrNa_(3)[Ag(S_(2)O_(3))_(2)+NaBr`
C. `C_(6)H_(4)(OH)_(2)+2AgBr^(**)rarrC_(6)H_(4)O_(2)+2HBr+2Ag`
D. `AgBr+2NH_(3)rarr[Ag(NH_(3))_(2)]Br`

Answer

3

Explanation

Developing involves the decomposition of `AgBr` to `Ag`.
`2AgBr^(**)(s)+2OH^(-)(aq)+C_(6)H_(4)(OH)_(2)rarr2Ag(s)+2HH_(2)O+2Br^(-)(aq)+C_(6)H_(4)O_(2)(aq)`
Where `AgBr^(**)` represents a molecule of AgBr exposed to light.