Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Indira Gandhi International Airport
Table title:
Runways
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Runway Number </th><th colspan=1 rowspan=1 > Length </th><th colspan=1 rowspan=1 > Width </th><th colspan=1 rowspan=1 > Approach Lights/ILS </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 29/11 </td><td class="highlighted"  colspan=1 rowspan=1 > 4,430 m (14,530 ft) </td><td class="highlighted"  colspan=1 rowspan=1 > 60 m (200 ft) </td><td class="highlighted"  colspan=1 rowspan=1 > CAT III-B / CAT III-B </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 28/10 </td><td class="highlighted"  colspan=1 rowspan=1 > 3,810 m (12,500 ft) </td><td class="highlighted"  colspan=1 rowspan=1 > 46 m (151 ft) </td><td colspan=1 rowspan=1 > CAT III-B / CAT I </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 27/09 </td><td class="highlighted"  colspan=1 rowspan=1 > 2,813 m (9,229 ft) </td><td class="highlighted"  colspan=1 rowspan=1 > 45 m (148 ft) </td><td colspan=1 rowspan=1 > CAT I / CAT I </td></tr>
</table>
Question:
What is the appropriate category for this airport?
Answer:
The Indira Gandhi International Airport has three runways: runway 11/29, 4,430 m × 60 m (14,530 ft × 200 ft) with CAT IIIB instrument landing system (ILS), runway 10/28, 3,810 m × 46 m (12,500 ft × 151 ft), and runway 09/27, 2,813 m × 45 m (9,229 ft × 148 ft).