If the efficiency of a transformer is 100%, which of the following equations would be correct?

• A N\(_p\)E\(_p\) = N\(_s\)E\(_s\)
• B N\(_s\)I\(_p\)= N\(_p\)I\(_s\)
• C N\(_s\)I\(_s\) = N\(_p\)I\(_p\)
• D I\(_p\)E\(_s\) = I\(_s\)E\(_p\)