A fully charged capacitor has a capacitance ?C?. It is discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat capacity ?s? and mass ?m?. If the temperature of the block is raised by ?\[\Delta T\]?, the potential difference ?V? across the capacitance is [AIEEE 2005]

• A.            \[\frac{ms\Delta T}{C}\]  
• B.            \[\sqrt{\frac{2ms\Delta T}{C}}\]
• C.            \[\sqrt{\frac{2mC\Delta T}{s}}\]                                      
• D.            \[\frac{mC\Delta T}{s}\]