A shopkeeper sold an item at 10% loss after giving a discount equal to half the marked price. Then the cost price is

• A. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>1</center></td><td rowspan="2">th of marked price</td></tr><tr><td style="text-align: center;">9</td></tr></table>
• B. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>4</center></td><td rowspan="2">th of marked price</td></tr><tr><td style="text-align: center;">9</td></tr></table>
• C. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>5</center></td><td rowspan="2">th of marked price</td></tr><tr><td style="text-align: center;">9</td></tr></table>
• D. <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>7</center></td><td rowspan="2">th of marked price</td></tr><tr><td style="text-align: center;">9</td></tr></table>