In a single-phase transformer, the total iron loss is $2500\:W$ at nominal voltage of $440\:V$ and frequency $50\:Hz$. The total iron loss is $850\:W$ at $220\:V$ and $25\:Hz$. Then, at nominal voltage and frequency, the hysteresis loss and eddy current loss respectively are
- $1600\:W$ and $900\:W$
- $900\:W$ and $1600\:W$
- $250\:W$ and $600\:W$
- $600\:W$ and $250\:W$