At 298K the standard free energy of formation of \[{{H}_{2}}O(l)\] is \[-237.20\text{ }kJ/mol\] while that of its ionisation into \[{{H}^{+}}\] ion and hydroxyl ions is 80 kJ/ mol, then the emf of the following cell at 298 K will be [Take Faraday constant F = 96500 C] \[{{H}_{2}}(g,1bar)|{{H}^{+}}(1M)||O{{H}^{-}}(1M)|{{O}_{2}}(g,1\,bar)\]

• A. 0.40 V              
• B. 0.81 V
• C. 1.23 V              
• D. \[-0.40\text{ }V\]