A solution containing one mole per litre of each \[Cu{{(N{{O}_{3}})}_{2}},\,\,AgN{{O}_{3}},\,\,H{{g}_{2}}{{(N{{O}_{3}})}_{2}}\] and \[Mg{{(N{{O}_{3}})}_{2}},\] is being electrolysed by using inert electrodes. The values of standard electrode potentials in volts (reduction potentials) are \[Ag/A{{g}^{+}}=+0.80,\,\,2Hg/Hg_{2}^{2+}=+0.79,\,\,Cu/C{{u}^{2+}}=+0.34,\]\[Mg/M{{g}^{2+}}=-2.37\]with increasing voltage, the sequence of deposition of metals on the cathode will be [IIT 1984; AMU 1999; Kerala PMT 2004]

• A.                 \[Ag,\,\,Hg,\,\,Cu,\,\,Mg\]         
• B.                 \[Mg,\,\,Cu,\,\,Hg,\,\,Ag\]
• C.                 \[Ag,\,\,Hg,\,\,Cu\]        
• D.                 \[Cu,\,\,Hg,\,\,Ag\]