The angle of elevation of a ladder leaning against a house is 60 and the foot of the ladder is 6.5 metres from the house. The length of the ladder is

• A. <table><tr><td rowspan="2"></td><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>13</center></td><td rowspan="2">m</td></tr><td align="center"> <span style=" text-decoration: overline;">3</span></td></table>
• B. 13 metres
• C. 15 metres
• D. 3.25 metres