Aldehydes, Ketones & Acids · Acidic strength of carboxylic acids

The correct order of acidic strength of the major products formed in the given reactions, is :

(A) $\mathrm{PhNH_2}\xrightarrow[\substack{\text{(2) }\ce{CuCN}\\ \text{(3) }\ce{H3O+}/\Delta}]{\text{(1) }\ce{NaNO2 + HCl}\,(<5^\circ\mathrm{C})}[\mathrm{A}]$
(B) $\ce{CH3CH2CHO}\xrightarrow[\Delta]{\ce{[Ag(NH3)2]+}\text{, }\ce{OH-}}[\mathrm{B}]$
(C) $\ce{CH4 + O2}\xrightarrow[\text{(ii) }\ce{Na2Cr2O7}/\ce{H+}]{\text{(i) }\ce{Mo2O3}}[\mathrm{C}]$
(D) $\ce{PhCH2MgBr + CO2}\xrightarrow[\ce{H3O+}]{\text{Dry ether}}[\mathrm{D}]$

Choose the correct answer from the options given below :

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