If the selling price of 4 articles is equal to the cost price of 5 articles, the profit per cent is

• A. 20%
• B. <table><tr><td rowspan="2"> 22 </td> <td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2"> % </td></tr><td align="center">2</td></table>
• C. 25%
• D. 30%