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:
Kahmari Montgomery
Table title:
Personal bests
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Event </th><th colspan=1 rowspan=1 > Time </th><th colspan=1 rowspan=1 > Competition </th><th colspan=1 rowspan=1 > Venue </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td colspan=1 rowspan=3 > 200 m </td><td colspan=1 rowspan=1 > 20.48 </td><td colspan=1 rowspan=1 > AAC Championships </td><td colspan=1 rowspan=1 > Cincinnati, Ohio </td><td colspan=1 rowspan=1 > May 13, 2018 </td><td colspan=1 rowspan=1 > −0.4 m/s wind </td></tr>
<tr> <td colspan=1 rowspan=1 > 20.41 </td><td colspan=1 rowspan=1 > Houston Alumni Invitational </td><td colspan=1 rowspan=1 > Houston, Texas </td><td colspan=1 rowspan=1 > April 6, 2019 </td><td colspan=1 rowspan=1 > w, +3.5 m/s wind </td></tr>
<tr> <td colspan=1 rowspan=1 > 20.63 </td><td colspan=1 rowspan=1 > Charlie Thomas Invitational </td><td colspan=1 rowspan=1 > College Station, Texas </td><td colspan=1 rowspan=1 > February 2, 2019 </td><td colspan=1 rowspan=1 > i </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > 400 m </td><td colspan=1 rowspan=1 > 44.58 </td><td colspan=1 rowspan=1 > USA Championships </td><td colspan=1 rowspan=1 > Des Moines, Iowa </td><td colspan=1 rowspan=1 > June 23, 2018 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 45.03 </td><td class="highlighted"  colspan=1 rowspan=1 > NCAA Division I Indoor Championships </td><td colspan=1 rowspan=1 > Birmingham, Alabama </td><td colspan=1 rowspan=1 > March 9, 2019 </td><td colspan=1 rowspan=1 > i </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 × 400 m relay (split) </td><td colspan=1 rowspan=1 > 43.38 </td><td colspan=1 rowspan=1 > Penn Relays </td><td colspan=1 rowspan=1 > Philadelphia, Pennsylvania </td><td colspan=1 rowspan=1 > April 28, 2018 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 4 × 200 m relay </td><td colspan=1 rowspan=1 > 1:20.94 </td><td colspan=1 rowspan=1 > Texas Relays </td><td colspan=1 rowspan=1 > Austin, Texas </td><td colspan=1 rowspan=1 > March 30, 2019 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=2 > 4 × 400 m relay </td><td colspan=1 rowspan=1 > 2:59.78 </td><td colspan=1 rowspan=1 > Athletics World Cup </td><td colspan=1 rowspan=1 > London, England </td><td colspan=1 rowspan=1 > July 15, 2018 </td><td colspan=1 rowspan=1 >  </td></tr>
<tr> <td colspan=1 rowspan=1 > 3:01.51 </td><td colspan=1 rowspan=1 > Tiger Paw Invitational </td><td colspan=1 rowspan=1 > Clemson, South Carolina </td><td colspan=1 rowspan=1 > February 9, 2019 </td><td colspan=1 rowspan=1 > i, WR shared with Amere Lattin, Obi Igbokwe, and Jermaine Holt. </td></tr>
</table>
Question:
What was Montgomery's personal best in what event at an NCAA championship?
Answer:
Kahmari Montgomery scored a personal best of 45.03 in the 400 m at the NCAA Division I Indoor Championships.