A reversible engine converts one-sixth of the heat input into work. When the temperature of the sink is reduced by\[62{}^\circ C\], the efficiency of the engine is doubled. The temperatures of the source and sink are

• A. \[80{}^\circ C\], \[37{}^\circ C\]          
• B. \[95{}^\circ C\], \[98{}^\circ C\]
• C. \[90{}^\circ C\], \[37{}^\circ C\]          
• D. \[99{}^\circ C\], \[37{}^\circ C\]